Insecticidal activity against second-instar larvae Plutella xylostella (diamondback moth) in compound treated cabbage leaves assessed as mortality after 48 hr by leaf dip method
|
Plutella xylostella
|
6.25
ug.mL-1
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 6
First Page : 922
Last Page : 931
Potency index, ratio of LC50 for cypermethrin to LC50 for test compound against Culex pipiens pallens (mosquito) fourth-instar larvae assessed as insect mortality measured 24 hr post compound exposure by dipping method
|
Culex pipiens pallens
|
883.0
|
|
Journal : J Agric Food Chem
Year : 2011
Volume : 59
Issue : 4
First Page : 1171
Last Page : 1177
Insecticidal activity against Culex pipiens pallens (mosquito) fourth-instar larvae assessed as insect mortality measured 24 hr post compound exposure by dipping method
|
Culex pipiens pallens
|
0.0033
mg/L
|
|
Insecticidal activity against Culex pipiens pallens (mosquito) fourth-instar larvae assessed as insect mortality measured 24 hr post compound exposure by dipping method
|
Culex pipiens pallens
|
0.0012
ug.mL-1
|
|
Journal : J Agric Food Chem
Year : 2011
Volume : 59
Issue : 4
First Page : 1171
Last Page : 1177
Insecticidal activity against Mythimna separata (Oriental armyworm) grown on compound pre-treated corn leaves assessed as insect mortality measured 48 hr post compound exposure
|
Mythimna separata
|
0.149
ug.mL-1
|
|
Journal : J Agric Food Chem
Year : 2011
Volume : 59
Issue : 4
First Page : 1171
Last Page : 1177
Effect on total amino acids level in Sogatella furcifera-sensitive Oryza sativa (rice) plant ARC6248 leaf blade measured per gram of dry weight at 0.025% concentration (Rvb = 3.54 mg/g fresh wt)
|
Oryza sativa
|
4.21
mg
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 2
First Page : 118
Last Page : 124
Effect on total amino acids level in Sogatella furcifera-resistanct Oryza sativa (rice) plant PR116 leaf blade measured per gram of dry weight at 0.025% concentration (Rvb = 3.91 mg/g fresh wt)
|
Oryza sativa
|
4.62
mg
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 2
First Page : 118
Last Page : 124
Effect on total protein level in Sogatella furcifera-sensitive Oryza sativa (rice) plant ARC6248 leaf blade measured per gram of dry weight at 0.025% concentration (Rvb = 17.67 mg/g fresh wt)
|
Oryza sativa
|
19.83
mg
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 2
First Page : 118
Last Page : 124
Effect on total protein level in Sogatella furcifera-resistanct Oryza sativa (rice) plant PR116 leaf blade measured per gram of dry weight at 0.025% concentration (Rvb = 21.67 mg/g fresh wt)
|
Oryza sativa
|
23.89
mg
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 2
First Page : 118
Last Page : 124
Effect on total phenols level in Sogatella furcifera-sensitive Oryza sativa (rice) plant ARC6248 leaf blade measured per gram of dry weight at 0.025% concentration (Rvb = 17.08 mg/g dry wt)
|
Oryza sativa
|
17.08
mg
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 2
First Page : 118
Last Page : 124
Effect on total phenols level in Sogatella furcifera-resistanct Oryza sativa (rice) plant PR116 leaf blade measured per gram of dry weight at 0.025% concentration (Rvb = 8.08 mg/g dry wt)
|
Oryza sativa
|
6.92
mg
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 2
First Page : 118
Last Page : 124
Effect on reducing sugar level in Sogatella furcifera-sensitive Oryza sativa (rice) plant ARC6248 leaf blade measured per gram of dry weight at 0.025% concentration (Rvb = 8.37 mg/g dry wt)
|
Oryza sativa
|
12.28
mg
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 2
First Page : 118
Last Page : 124
Effect on reducing sugar level in Sogatella furcifera-resistanct Oryza sativa (rice) plant PR116 leaf blade measured per gram of dry weight at 0.025% concentration (Rvb = 9.35 mg/g dry wt)
|
Oryza sativa
|
14.35
mg
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 2
First Page : 118
Last Page : 124
Effect on total sugar level in Sogatella furcifera-sensitive Oryza sativa (rice) plant ARC6248 leaf blade measured per gram of dry weight at 0.025% concentration (Rvb = 34.05 mg/g dry wt)
|
Oryza sativa
|
38.84
mg
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 2
First Page : 118
Last Page : 124
Effect on total sugar level in Sogatella furcifera-resistanct Oryza sativa (rice) plant PR116 leaf blade measured per gram of dry weight at 0.025% concentration (Rvb = 36.16 mg/g dry wt)
|
Oryza sativa
|
44.2
mg
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 2
First Page : 118
Last Page : 124
Effect on total amino acids level in Sogatella furcifera-sensitive Oryza sativa (rice) plant ARC6248 leaf sheath measured per gram of dry weight at 0.025% concentration (Rvb = 2.11 mg/g fresh wt)
|
Oryza sativa
|
2.95
mg
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 2
First Page : 118
Last Page : 124
Effect on total amino acids level in Sogatella furcifera-resistanct Oryza sativa (rice) plant PR116 leaf sheath measured per gram of dry weight at 0.025% concentration (Rvb = 2.58 mg/g fresh wt)
|
Oryza sativa
|
3.73
mg
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 2
First Page : 118
Last Page : 124
Effect on total protein level in Sogatella furcifera-sensitive Oryza sativa (rice) plant ARC6248 leaf sheath measured per gram of dry weight at 0.025% concentration (Rvb = 6.11 mg/g fresh wt)
|
Oryza sativa
|
7.78
mg
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 2
First Page : 118
Last Page : 124
Effect on total protein level in Sogatella furcifera-resistanct Oryza sativa (rice) plant PR116 leaf sheath measured per gram of dry weight at 0.025% concentration (Rvb = 7.06 mg/g fresh wt)
|
Oryza sativa
|
8.0
mg
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 2
First Page : 118
Last Page : 124
Effect on total phenols level in Sogatella furcifera-sensitive Oryza sativa (rice) plant ARC6248 leaf sheath measured per gram of dry weight at 0.025% concentration (Rvb = 12.75 mg/g dry wt)
|
Oryza sativa
|
12.0
mg
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 2
First Page : 118
Last Page : 124
Miticidal activity against compound treated Phaseolus vulgaris leaf-fed female Typhlodromus pyri Scheuten 13 assessed as mortality at 17.5 mg/l sprayed on leaf disks measured after 3 days
|
Typhlodromus pyri
|
75.0
%
|
|
Journal : Crop Protection
Year : 2008
Volume : 27
Issue : 3
First Page : 855
Last Page : 858
Miticidal activity against compound treated Phaseolus vulgaris leaf-fed female Typhlodromus pyri Scheuten 12 assessed as mortality at 17.5 mg/l sprayed on leaf disks measured after 3 days
|
Typhlodromus pyri
|
20.6
%
|
|
Journal : Crop Protection
Year : 2008
Volume : 27
Issue : 3
First Page : 855
Last Page : 858
Miticidal activity against compound treated Phaseolus vulgaris leaf-fed female Typhlodromus pyri Scheuten 11 assessed as mortality at 17.5 mg/l sprayed on leaf disks measured after 3 days
|
Typhlodromus pyri
|
62.9
%
|
|
Journal : Crop Protection
Year : 2008
Volume : 27
Issue : 3
First Page : 855
Last Page : 858
Miticidal activity against compound treated Phaseolus vulgaris leaf-fed female Typhlodromus pyri Scheuten 10 assessed as mortality at 17.5 mg/l sprayed on leaf disks measured after 3 days
|
Typhlodromus pyri
|
100.0
%
|
|
Journal : Crop Protection
Year : 2008
Volume : 27
Issue : 3
First Page : 855
Last Page : 858
Miticidal activity against compound treated Phaseolus vulgaris leaf-fed female Typhlodromus pyri Scheuten 9 assessed as mortality at 17.5 mg/l sprayed on leaf disks measured after 3 days
|
Typhlodromus pyri
|
74.0
%
|
|
Journal : Crop Protection
Year : 2008
Volume : 27
Issue : 3
First Page : 855
Last Page : 858
Miticidal activity against compound treated Phaseolus vulgaris leaf-fed female Typhlodromus pyri Scheuten 8 assessed as mortality at 17.5 mg/l sprayed on leaf disks measured after 3 days
|
Typhlodromus pyri
|
31.2
%
|
|
Journal : Crop Protection
Year : 2008
Volume : 27
Issue : 3
First Page : 855
Last Page : 858
Miticidal activity against compound treated Phaseolus vulgaris leaf-fed female Typhlodromus pyri Scheuten 7 assessed as mortality at 17.5 mg/l sprayed on leaf disks measured after 3 days
|
Typhlodromus pyri
|
23.6
%
|
|
Journal : Crop Protection
Year : 2008
Volume : 27
Issue : 3
First Page : 855
Last Page : 858
Miticidal activity against compound treated Phaseolus vulgaris leaf-fed female Typhlodromus pyri Scheuten 6 assessed as mortality at 17.5 mg/l sprayed on leaf disks measured after 3 days
|
Typhlodromus pyri
|
5.3
%
|
|
Journal : Crop Protection
Year : 2008
Volume : 27
Issue : 3
First Page : 855
Last Page : 858
Miticidal activity against compound treated Phaseolus vulgaris leaf-fed female Typhlodromus pyri Scheuten 5 assessed as mortality at 17.5 mg/l sprayed on leaf disks measured after 3 days
|
Typhlodromus pyri
|
86.1
%
|
|
Journal : Crop Protection
Year : 2008
Volume : 27
Issue : 3
First Page : 855
Last Page : 858
Miticidal activity against compound treated Phaseolus vulgaris leaf-fed female Typhlodromus pyri Scheuten 4 assessed as mortality at 17.5 mg/l sprayed on leaf disks measured after 3 days
|
Typhlodromus pyri
|
84.3
%
|
|
Journal : Crop Protection
Year : 2008
Volume : 27
Issue : 3
First Page : 855
Last Page : 858
Miticidal activity against compound treated Phaseolus vulgaris leaf-fed female Typhlodromus pyri Scheuten 3 assessed as mortality at 17.5 mg/l sprayed on leaf disks measured after 3 days
|
Typhlodromus pyri
|
61.8
%
|
|
Journal : Crop Protection
Year : 2008
Volume : 27
Issue : 3
First Page : 855
Last Page : 858
Miticidal activity against compound treated Phaseolus vulgaris leaf-fed female Typhlodromus pyri Scheuten 2 assessed as mortality at 17.5 mg/l sprayed on leaf disks measured after 3 days
|
Typhlodromus pyri
|
92.0
%
|
|
Journal : Crop Protection
Year : 2008
Volume : 27
Issue : 3
First Page : 855
Last Page : 858
Miticidal activity against compound treated Phaseolus vulgaris leaf-fed female Typhlodromus pyri Scheuten 1 assessed as mortality at 17.5 mg/l sprayed on leaf disks measured after 3 days
|
Typhlodromus pyri
|
90.2
%
|
|
Journal : Crop Protection
Year : 2008
Volume : 27
Issue : 3
First Page : 855
Last Page : 858
Insecticidal activity against Sogatella furcifera on insect-resistanct rice plant PR116 assessed as nymphal duration at 0.025% concentration (Rvb = 11.75 days)
|
Sogatella furcifera
|
11.63
day
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 2
First Page : 118
Last Page : 124
Insecticidal activity against Sogatella furcifera on insect-sensitive rice plant ARC6248 assessed as resurgence ratio at 0.025% concentration
|
Sogatella furcifera
|
1.28
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 2
First Page : 118
Last Page : 124
Insecticidal activity against Sogatella furcifera on insect-resistanct rice plant PR116 assessed as resurgence ratio at 0.025% concentration
|
Sogatella furcifera
|
1.75
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 2
First Page : 118
Last Page : 124
Effect on total phenols level in Sogatella furcifera-resistanct Oryza sativa (rice) plant PR116 leaf sheath measured per gram of dry weight at 0.025% concentration (Rvb = 5.75 mg/g dry wt)
|
Oryza sativa
|
5.42
mg
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 2
First Page : 118
Last Page : 124
Effect on reducing sugar level in Sogatella furcifera-sensitive Oryza sativa (rice) plant ARC6248 leaf sheath measured per gram of dry weight at 0.025% concentration (Rvb = 6.41 mg/g dry wt)
|
Oryza sativa
|
10.76
mg
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 2
First Page : 118
Last Page : 124
Effect on reducing sugar level in Sogatella furcifera-resistanct Oryza sativa (rice) plant PR116 leaf sheath measured per gram of dry weight at 0.025% concentration (Rvb = 7.50 mg/g dry wt)
|
Oryza sativa
|
13.8
mg
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 2
First Page : 118
Last Page : 124
Effect on total sugar level in Sogatella furcifera-sensitive Oryza sativa (rice) plant ARC6248 leaf sheath measured per gram of dry weight at 0.025% concentration (Rvb = 25.98 mg/g dry wt)
|
Oryza sativa
|
35.36
mg
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 2
First Page : 118
Last Page : 124
Effect on total sugar level in Sogatella furcifera-resistanct Oryza sativa (rice) plant PR116 leaf sheath measured per gram of dry weight at 0.025% concentration (Rvb = 30.27 mg/g dry wt)
|
Oryza sativa
|
35.62
mg
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 2
First Page : 118
Last Page : 124
Insecticidal activity against Sogatella furcifera on insect-sensitive rice plant ARC6248 assessed as growth index at 0.025% concentration (Rvb = 2.38%)
|
Sogatella furcifera
|
2.74
%
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 2
First Page : 118
Last Page : 124
Insecticidal activity against Sogatella furcifera on insect-resistanct rice plant PR116 assessed as growth index at 0.025% concentration (Rvb = 6.02%)
|
Sogatella furcifera
|
6.77
%
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 2
First Page : 118
Last Page : 124
Insecticidal activity against Sogatella furcifera on insect-sensitive rice plant ARC6248 assessed as nymphal survival at 0.025% concentration (Rvb = 34.17%)
|
Sogatella furcifera
|
38.89
%
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 2
First Page : 118
Last Page : 124
Insecticidal activity against Sogatella furcifera on insect-resistanct rice plant PR116 assessed as nymphal survival at 0.025% concentration (Rvb = 70.28%)
|
Sogatella furcifera
|
78.05
%
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 2
First Page : 118
Last Page : 124
Insecticidal activity against Sogatella furcifera on insect-sensitive rice plant ARC6248 assessed as nymphal duration at 0.025% concentration (Rvb = 14.48 days)
|
Sogatella furcifera
|
14.32
day
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 2
First Page : 118
Last Page : 124
Relative toxicity in second instar Spodoptera frugiperda (fall armyworm) in compound treated maize leaf assessed as mortality measured by Time-mortality bioassay
|
Spodoptera frugiperda
|
2.63
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 12
First Page : 1535
Last Page : 1540
Insecticidal activity in second instar Spodoptera frugiperda (fall armyworm) in compound treated maize leaf assessed as mortality measured by Time-mortality bioassay
|
Spodoptera frugiperda
|
44.84
min
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 12
First Page : 1535
Last Page : 1540
Selectivity ratio of LC50 for adult earwig species Doru luteipes to LC50 for second instar fall armyworm Spodoptera frugiperda by concentration-mortality bioassay
|
None
|
152.0
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 12
First Page : 1535
Last Page : 1540
Relative toxicity in adult Doru luteipes (earwigs) in compound treated maize leaf assessed as mortality measured after 48 hr by concentration-mortality bioassay
|
Doru
|
33000.0
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 12
First Page : 1535
Last Page : 1540
Insecticidal activity against adult Doru luteipes (earwigs) in compound treated maize leaf assessed as mortality measured after 48 hr by concentration-mortality bioassay
|
Doru
|
22.6
ug.mL-1
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 12
First Page : 1535
Last Page : 1540
Relative toxicity in second instar Spodoptera frugiperda (fall armyworm) in compound treated maize leaf assessed as mortality measured after 48 hr by concentration-mortality bioassay
|
Spodoptera frugiperda
|
23.2
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 12
First Page : 1535
Last Page : 1540
Insecticidal activity in second instar Spodoptera frugiperda (fall armyworm) in compound treated maize leaf assessed as mortality measured after 48 hr by concentration-mortality bioassay
|
Spodoptera frugiperda
|
0.18
ug.mL-1
|
|
Journal : Crop Protection
Year : 2011
Volume : 30
Issue : 12
First Page : 1535
Last Page : 1540
Resistance factor, ratio of LD50 for fourth-instar larval stage of Helicoverpa armigera field strain Gaschiga isolated from tomato plant to LD50 for fourth-instar larval stage of pyrethroid-susceptible Helicoverpa armigera laboratory strain BK-77
|
Helicoverpa armigera
|
316.0
|
|
Journal : Pest Manag Sci
Title : Esterase-mediated resistance to pyrethroids in field populations of Helicoverpa armigera (Lepidoptera: Noctuidae) from Central Africa.
Year : 2009
Volume : 65
Issue : 10
First Page : 1147
Last Page : 1154
Authors : Achaleke J, Martin T, Ghogomu RT, Vaissayre M, Brévault T.
Abstract : BACKGROUND: Evolution of pyrethroid resistance in the cotton bollworm Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) threatens continued cotton production in Central Africa. Dose-response bioassays were conducted on area-wide collection of bollworm populations from major host plants, while biochemical techniques were used to evaluate basic mechanisms underlying resistance. RESULTS: Pyrethroid resistance is primarily associated with detoxification by enhanced esterase activity. High resistance to cypermethrin (RF = 67-1771), cross-resistance to deltamethrin (RF = 60-2972) and lack of cross-resistance to the non-ester pyrethroid etofenprox (RF = 2-10) were observed among H. armigera field populations and laboratory-selected strains. Enzymatic assays showed that esterase activity, but not oxidase content or glutathione-S-transferase activity, was positively correlated with resistance to cypermethrin. Pretreatment with piperonyl butoxide (PBO) resulted in significant synergism with cypermethrin in 6/10 field populations, but not in the laboratory-selected strain, indicating that additional mechanisms such as mixed-function oxidase (MFO) may be involved in field resistance. The absence of cross-resistance to DDT ruled out a possible target-site modification. CONCLUSION: Knowledge of the mechanisms involved in pyrethroid resistance and the lack of cross-resistance to spinosad and indoxacarb is a key to devising new resistance management strategies aimed at restoring the efficacy of pyrethroid-based programmes.
Resistance factor, ratio of LD50 for fourth-instar larval stage of Helicoverpa armigera field strain Ngong to LD50 for fourth-instar larval stage of pyrethroid-susceptible Helicoverpa armigera laboratory strain BK-77
|
Helicoverpa armigera
|
134.0
|
|
Journal : Pest Manag Sci
Title : Esterase-mediated resistance to pyrethroids in field populations of Helicoverpa armigera (Lepidoptera: Noctuidae) from Central Africa.
Year : 2009
Volume : 65
Issue : 10
First Page : 1147
Last Page : 1154
Authors : Achaleke J, Martin T, Ghogomu RT, Vaissayre M, Brévault T.
Abstract : BACKGROUND: Evolution of pyrethroid resistance in the cotton bollworm Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) threatens continued cotton production in Central Africa. Dose-response bioassays were conducted on area-wide collection of bollworm populations from major host plants, while biochemical techniques were used to evaluate basic mechanisms underlying resistance. RESULTS: Pyrethroid resistance is primarily associated with detoxification by enhanced esterase activity. High resistance to cypermethrin (RF = 67-1771), cross-resistance to deltamethrin (RF = 60-2972) and lack of cross-resistance to the non-ester pyrethroid etofenprox (RF = 2-10) were observed among H. armigera field populations and laboratory-selected strains. Enzymatic assays showed that esterase activity, but not oxidase content or glutathione-S-transferase activity, was positively correlated with resistance to cypermethrin. Pretreatment with piperonyl butoxide (PBO) resulted in significant synergism with cypermethrin in 6/10 field populations, but not in the laboratory-selected strain, indicating that additional mechanisms such as mixed-function oxidase (MFO) may be involved in field resistance. The absence of cross-resistance to DDT ruled out a possible target-site modification. CONCLUSION: Knowledge of the mechanisms involved in pyrethroid resistance and the lack of cross-resistance to spinosad and indoxacarb is a key to devising new resistance management strategies aimed at restoring the efficacy of pyrethroid-based programmes.
Resistance factor, ratio of LD50 for fourth-instar larval stage of Helicoverpa armigera field strain Pitoa isolated from tomato plant to LD50 for fourth-instar larval stage of pyrethroid-susceptible Helicoverpa armigera laboratory strain BK-77
|
Helicoverpa armigera
|
756.0
|
|
Journal : Pest Manag Sci
Title : Esterase-mediated resistance to pyrethroids in field populations of Helicoverpa armigera (Lepidoptera: Noctuidae) from Central Africa.
Year : 2009
Volume : 65
Issue : 10
First Page : 1147
Last Page : 1154
Authors : Achaleke J, Martin T, Ghogomu RT, Vaissayre M, Brévault T.
Abstract : BACKGROUND: Evolution of pyrethroid resistance in the cotton bollworm Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) threatens continued cotton production in Central Africa. Dose-response bioassays were conducted on area-wide collection of bollworm populations from major host plants, while biochemical techniques were used to evaluate basic mechanisms underlying resistance. RESULTS: Pyrethroid resistance is primarily associated with detoxification by enhanced esterase activity. High resistance to cypermethrin (RF = 67-1771), cross-resistance to deltamethrin (RF = 60-2972) and lack of cross-resistance to the non-ester pyrethroid etofenprox (RF = 2-10) were observed among H. armigera field populations and laboratory-selected strains. Enzymatic assays showed that esterase activity, but not oxidase content or glutathione-S-transferase activity, was positively correlated with resistance to cypermethrin. Pretreatment with piperonyl butoxide (PBO) resulted in significant synergism with cypermethrin in 6/10 field populations, but not in the laboratory-selected strain, indicating that additional mechanisms such as mixed-function oxidase (MFO) may be involved in field resistance. The absence of cross-resistance to DDT ruled out a possible target-site modification. CONCLUSION: Knowledge of the mechanisms involved in pyrethroid resistance and the lack of cross-resistance to spinosad and indoxacarb is a key to devising new resistance management strategies aimed at restoring the efficacy of pyrethroid-based programmes.
Resistance factor, ratio of LD50 for fourth-instar larval stage of Helicoverpa armigera field strain Tchollire to LD50 for fourth-instar larval stage of pyrethroid-susceptible Helicoverpa armigera laboratory strain BK-77
|
Helicoverpa armigera
|
60.0
|
|
Journal : Pest Manag Sci
Title : Esterase-mediated resistance to pyrethroids in field populations of Helicoverpa armigera (Lepidoptera: Noctuidae) from Central Africa.
Year : 2009
Volume : 65
Issue : 10
First Page : 1147
Last Page : 1154
Authors : Achaleke J, Martin T, Ghogomu RT, Vaissayre M, Brévault T.
Abstract : BACKGROUND: Evolution of pyrethroid resistance in the cotton bollworm Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) threatens continued cotton production in Central Africa. Dose-response bioassays were conducted on area-wide collection of bollworm populations from major host plants, while biochemical techniques were used to evaluate basic mechanisms underlying resistance. RESULTS: Pyrethroid resistance is primarily associated with detoxification by enhanced esterase activity. High resistance to cypermethrin (RF = 67-1771), cross-resistance to deltamethrin (RF = 60-2972) and lack of cross-resistance to the non-ester pyrethroid etofenprox (RF = 2-10) were observed among H. armigera field populations and laboratory-selected strains. Enzymatic assays showed that esterase activity, but not oxidase content or glutathione-S-transferase activity, was positively correlated with resistance to cypermethrin. Pretreatment with piperonyl butoxide (PBO) resulted in significant synergism with cypermethrin in 6/10 field populations, but not in the laboratory-selected strain, indicating that additional mechanisms such as mixed-function oxidase (MFO) may be involved in field resistance. The absence of cross-resistance to DDT ruled out a possible target-site modification. CONCLUSION: Knowledge of the mechanisms involved in pyrethroid resistance and the lack of cross-resistance to spinosad and indoxacarb is a key to devising new resistance management strategies aimed at restoring the efficacy of pyrethroid-based programmes.
Resistance factor, ratio of LD50 for fourth-instar larval stage of Helicoverpa armigera field strain Pitoa isolated from maize plant to LD50 for fourth-instar larval stage of pyrethroid-susceptible Helicoverpa armigera laboratory strain BK-77
|
Helicoverpa armigera
|
590.0
|
|
Journal : Pest Manag Sci
Title : Esterase-mediated resistance to pyrethroids in field populations of Helicoverpa armigera (Lepidoptera: Noctuidae) from Central Africa.
Year : 2009
Volume : 65
Issue : 10
First Page : 1147
Last Page : 1154
Authors : Achaleke J, Martin T, Ghogomu RT, Vaissayre M, Brévault T.
Abstract : BACKGROUND: Evolution of pyrethroid resistance in the cotton bollworm Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) threatens continued cotton production in Central Africa. Dose-response bioassays were conducted on area-wide collection of bollworm populations from major host plants, while biochemical techniques were used to evaluate basic mechanisms underlying resistance. RESULTS: Pyrethroid resistance is primarily associated with detoxification by enhanced esterase activity. High resistance to cypermethrin (RF = 67-1771), cross-resistance to deltamethrin (RF = 60-2972) and lack of cross-resistance to the non-ester pyrethroid etofenprox (RF = 2-10) were observed among H. armigera field populations and laboratory-selected strains. Enzymatic assays showed that esterase activity, but not oxidase content or glutathione-S-transferase activity, was positively correlated with resistance to cypermethrin. Pretreatment with piperonyl butoxide (PBO) resulted in significant synergism with cypermethrin in 6/10 field populations, but not in the laboratory-selected strain, indicating that additional mechanisms such as mixed-function oxidase (MFO) may be involved in field resistance. The absence of cross-resistance to DDT ruled out a possible target-site modification. CONCLUSION: Knowledge of the mechanisms involved in pyrethroid resistance and the lack of cross-resistance to spinosad and indoxacarb is a key to devising new resistance management strategies aimed at restoring the efficacy of pyrethroid-based programmes.
Resistance factor, ratio of LD50 for fourth-instar larval stage of pyrethroid-resistance Helicoverpa armigera laboratory strain GS-RR06 to LD50 for fourth-instar larval stage of pyrethroid-susceptible Helicoverpa armigera laboratory strain BK-77
|
Helicoverpa armigera
|
2972.0
|
|
Journal : Pest Manag Sci
Title : Esterase-mediated resistance to pyrethroids in field populations of Helicoverpa armigera (Lepidoptera: Noctuidae) from Central Africa.
Year : 2009
Volume : 65
Issue : 10
First Page : 1147
Last Page : 1154
Authors : Achaleke J, Martin T, Ghogomu RT, Vaissayre M, Brévault T.
Abstract : BACKGROUND: Evolution of pyrethroid resistance in the cotton bollworm Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) threatens continued cotton production in Central Africa. Dose-response bioassays were conducted on area-wide collection of bollworm populations from major host plants, while biochemical techniques were used to evaluate basic mechanisms underlying resistance. RESULTS: Pyrethroid resistance is primarily associated with detoxification by enhanced esterase activity. High resistance to cypermethrin (RF = 67-1771), cross-resistance to deltamethrin (RF = 60-2972) and lack of cross-resistance to the non-ester pyrethroid etofenprox (RF = 2-10) were observed among H. armigera field populations and laboratory-selected strains. Enzymatic assays showed that esterase activity, but not oxidase content or glutathione-S-transferase activity, was positively correlated with resistance to cypermethrin. Pretreatment with piperonyl butoxide (PBO) resulted in significant synergism with cypermethrin in 6/10 field populations, but not in the laboratory-selected strain, indicating that additional mechanisms such as mixed-function oxidase (MFO) may be involved in field resistance. The absence of cross-resistance to DDT ruled out a possible target-site modification. CONCLUSION: Knowledge of the mechanisms involved in pyrethroid resistance and the lack of cross-resistance to spinosad and indoxacarb is a key to devising new resistance management strategies aimed at restoring the efficacy of pyrethroid-based programmes.
Insecticidal activity against fourth-instar larval stage of Helicoverpa armigera field strain Gaschiga isolated from tomato plant assessed as mortality applied topically onto thorax measured after 48 hr
|
Helicoverpa armigera
|
15.8
microgAi/g
|
|
Journal : Pest Manag Sci
Title : Esterase-mediated resistance to pyrethroids in field populations of Helicoverpa armigera (Lepidoptera: Noctuidae) from Central Africa.
Year : 2009
Volume : 65
Issue : 10
First Page : 1147
Last Page : 1154
Authors : Achaleke J, Martin T, Ghogomu RT, Vaissayre M, Brévault T.
Abstract : BACKGROUND: Evolution of pyrethroid resistance in the cotton bollworm Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) threatens continued cotton production in Central Africa. Dose-response bioassays were conducted on area-wide collection of bollworm populations from major host plants, while biochemical techniques were used to evaluate basic mechanisms underlying resistance. RESULTS: Pyrethroid resistance is primarily associated with detoxification by enhanced esterase activity. High resistance to cypermethrin (RF = 67-1771), cross-resistance to deltamethrin (RF = 60-2972) and lack of cross-resistance to the non-ester pyrethroid etofenprox (RF = 2-10) were observed among H. armigera field populations and laboratory-selected strains. Enzymatic assays showed that esterase activity, but not oxidase content or glutathione-S-transferase activity, was positively correlated with resistance to cypermethrin. Pretreatment with piperonyl butoxide (PBO) resulted in significant synergism with cypermethrin in 6/10 field populations, but not in the laboratory-selected strain, indicating that additional mechanisms such as mixed-function oxidase (MFO) may be involved in field resistance. The absence of cross-resistance to DDT ruled out a possible target-site modification. CONCLUSION: Knowledge of the mechanisms involved in pyrethroid resistance and the lack of cross-resistance to spinosad and indoxacarb is a key to devising new resistance management strategies aimed at restoring the efficacy of pyrethroid-based programmes.
Insecticidal activity against fourth-instar larval stage of Helicoverpa armigera field strain Ngong isolated from cotton plant assessed as mortality applied topically onto thorax measured after 48 hr
|
Helicoverpa armigera
|
6.7
microgAi/g
|
|
Journal : Pest Manag Sci
Title : Esterase-mediated resistance to pyrethroids in field populations of Helicoverpa armigera (Lepidoptera: Noctuidae) from Central Africa.
Year : 2009
Volume : 65
Issue : 10
First Page : 1147
Last Page : 1154
Authors : Achaleke J, Martin T, Ghogomu RT, Vaissayre M, Brévault T.
Abstract : BACKGROUND: Evolution of pyrethroid resistance in the cotton bollworm Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) threatens continued cotton production in Central Africa. Dose-response bioassays were conducted on area-wide collection of bollworm populations from major host plants, while biochemical techniques were used to evaluate basic mechanisms underlying resistance. RESULTS: Pyrethroid resistance is primarily associated with detoxification by enhanced esterase activity. High resistance to cypermethrin (RF = 67-1771), cross-resistance to deltamethrin (RF = 60-2972) and lack of cross-resistance to the non-ester pyrethroid etofenprox (RF = 2-10) were observed among H. armigera field populations and laboratory-selected strains. Enzymatic assays showed that esterase activity, but not oxidase content or glutathione-S-transferase activity, was positively correlated with resistance to cypermethrin. Pretreatment with piperonyl butoxide (PBO) resulted in significant synergism with cypermethrin in 6/10 field populations, but not in the laboratory-selected strain, indicating that additional mechanisms such as mixed-function oxidase (MFO) may be involved in field resistance. The absence of cross-resistance to DDT ruled out a possible target-site modification. CONCLUSION: Knowledge of the mechanisms involved in pyrethroid resistance and the lack of cross-resistance to spinosad and indoxacarb is a key to devising new resistance management strategies aimed at restoring the efficacy of pyrethroid-based programmes.
Insecticidal activity against fourth-instar larval stage of Helicoverpa armigera field strain Pitoa isolated from tomato plant assessed as mortality applied topically onto thorax measured after 48 hr
|
Helicoverpa armigera
|
37.8
microgAi/g
|
|
Journal : Pest Manag Sci
Title : Esterase-mediated resistance to pyrethroids in field populations of Helicoverpa armigera (Lepidoptera: Noctuidae) from Central Africa.
Year : 2009
Volume : 65
Issue : 10
First Page : 1147
Last Page : 1154
Authors : Achaleke J, Martin T, Ghogomu RT, Vaissayre M, Brévault T.
Abstract : BACKGROUND: Evolution of pyrethroid resistance in the cotton bollworm Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) threatens continued cotton production in Central Africa. Dose-response bioassays were conducted on area-wide collection of bollworm populations from major host plants, while biochemical techniques were used to evaluate basic mechanisms underlying resistance. RESULTS: Pyrethroid resistance is primarily associated with detoxification by enhanced esterase activity. High resistance to cypermethrin (RF = 67-1771), cross-resistance to deltamethrin (RF = 60-2972) and lack of cross-resistance to the non-ester pyrethroid etofenprox (RF = 2-10) were observed among H. armigera field populations and laboratory-selected strains. Enzymatic assays showed that esterase activity, but not oxidase content or glutathione-S-transferase activity, was positively correlated with resistance to cypermethrin. Pretreatment with piperonyl butoxide (PBO) resulted in significant synergism with cypermethrin in 6/10 field populations, but not in the laboratory-selected strain, indicating that additional mechanisms such as mixed-function oxidase (MFO) may be involved in field resistance. The absence of cross-resistance to DDT ruled out a possible target-site modification. CONCLUSION: Knowledge of the mechanisms involved in pyrethroid resistance and the lack of cross-resistance to spinosad and indoxacarb is a key to devising new resistance management strategies aimed at restoring the efficacy of pyrethroid-based programmes.
Insecticidal activity against fourth-instar larval stage of Helicoverpa armigera field strain Pitoa isolated from maize plant assessed as mortality applied topically onto thorax measured after 48 hr
|
Helicoverpa armigera
|
29.5
microgAi/g
|
|
Journal : Pest Manag Sci
Title : Esterase-mediated resistance to pyrethroids in field populations of Helicoverpa armigera (Lepidoptera: Noctuidae) from Central Africa.
Year : 2009
Volume : 65
Issue : 10
First Page : 1147
Last Page : 1154
Authors : Achaleke J, Martin T, Ghogomu RT, Vaissayre M, Brévault T.
Abstract : BACKGROUND: Evolution of pyrethroid resistance in the cotton bollworm Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) threatens continued cotton production in Central Africa. Dose-response bioassays were conducted on area-wide collection of bollworm populations from major host plants, while biochemical techniques were used to evaluate basic mechanisms underlying resistance. RESULTS: Pyrethroid resistance is primarily associated with detoxification by enhanced esterase activity. High resistance to cypermethrin (RF = 67-1771), cross-resistance to deltamethrin (RF = 60-2972) and lack of cross-resistance to the non-ester pyrethroid etofenprox (RF = 2-10) were observed among H. armigera field populations and laboratory-selected strains. Enzymatic assays showed that esterase activity, but not oxidase content or glutathione-S-transferase activity, was positively correlated with resistance to cypermethrin. Pretreatment with piperonyl butoxide (PBO) resulted in significant synergism with cypermethrin in 6/10 field populations, but not in the laboratory-selected strain, indicating that additional mechanisms such as mixed-function oxidase (MFO) may be involved in field resistance. The absence of cross-resistance to DDT ruled out a possible target-site modification. CONCLUSION: Knowledge of the mechanisms involved in pyrethroid resistance and the lack of cross-resistance to spinosad and indoxacarb is a key to devising new resistance management strategies aimed at restoring the efficacy of pyrethroid-based programmes.
Insecticidal activity against fourth-instar larval stage of Helicoverpa armigera field strain Tchollire isolated from cotton plant assessed as mortality applied topically onto thorax measured after 48 hr
|
Helicoverpa armigera
|
3.0
microgAi/g
|
|
Journal : Pest Manag Sci
Title : Esterase-mediated resistance to pyrethroids in field populations of Helicoverpa armigera (Lepidoptera: Noctuidae) from Central Africa.
Year : 2009
Volume : 65
Issue : 10
First Page : 1147
Last Page : 1154
Authors : Achaleke J, Martin T, Ghogomu RT, Vaissayre M, Brévault T.
Abstract : BACKGROUND: Evolution of pyrethroid resistance in the cotton bollworm Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) threatens continued cotton production in Central Africa. Dose-response bioassays were conducted on area-wide collection of bollworm populations from major host plants, while biochemical techniques were used to evaluate basic mechanisms underlying resistance. RESULTS: Pyrethroid resistance is primarily associated with detoxification by enhanced esterase activity. High resistance to cypermethrin (RF = 67-1771), cross-resistance to deltamethrin (RF = 60-2972) and lack of cross-resistance to the non-ester pyrethroid etofenprox (RF = 2-10) were observed among H. armigera field populations and laboratory-selected strains. Enzymatic assays showed that esterase activity, but not oxidase content or glutathione-S-transferase activity, was positively correlated with resistance to cypermethrin. Pretreatment with piperonyl butoxide (PBO) resulted in significant synergism with cypermethrin in 6/10 field populations, but not in the laboratory-selected strain, indicating that additional mechanisms such as mixed-function oxidase (MFO) may be involved in field resistance. The absence of cross-resistance to DDT ruled out a possible target-site modification. CONCLUSION: Knowledge of the mechanisms involved in pyrethroid resistance and the lack of cross-resistance to spinosad and indoxacarb is a key to devising new resistance management strategies aimed at restoring the efficacy of pyrethroid-based programmes.
Insecticidal activity against fourth-instar larval stage of pyrethroid-resistance Helicoverpa armigera laboratory strain GS-RR06 assessed as mortality applied topically onto thorax measured after 48 hr
|
Helicoverpa armigera
|
148.6
microgAi/g
|
|
Journal : Pest Manag Sci
Title : Esterase-mediated resistance to pyrethroids in field populations of Helicoverpa armigera (Lepidoptera: Noctuidae) from Central Africa.
Year : 2009
Volume : 65
Issue : 10
First Page : 1147
Last Page : 1154
Authors : Achaleke J, Martin T, Ghogomu RT, Vaissayre M, Brévault T.
Abstract : BACKGROUND: Evolution of pyrethroid resistance in the cotton bollworm Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) threatens continued cotton production in Central Africa. Dose-response bioassays were conducted on area-wide collection of bollworm populations from major host plants, while biochemical techniques were used to evaluate basic mechanisms underlying resistance. RESULTS: Pyrethroid resistance is primarily associated with detoxification by enhanced esterase activity. High resistance to cypermethrin (RF = 67-1771), cross-resistance to deltamethrin (RF = 60-2972) and lack of cross-resistance to the non-ester pyrethroid etofenprox (RF = 2-10) were observed among H. armigera field populations and laboratory-selected strains. Enzymatic assays showed that esterase activity, but not oxidase content or glutathione-S-transferase activity, was positively correlated with resistance to cypermethrin. Pretreatment with piperonyl butoxide (PBO) resulted in significant synergism with cypermethrin in 6/10 field populations, but not in the laboratory-selected strain, indicating that additional mechanisms such as mixed-function oxidase (MFO) may be involved in field resistance. The absence of cross-resistance to DDT ruled out a possible target-site modification. CONCLUSION: Knowledge of the mechanisms involved in pyrethroid resistance and the lack of cross-resistance to spinosad and indoxacarb is a key to devising new resistance management strategies aimed at restoring the efficacy of pyrethroid-based programmes.
Insecticidal activity against fourth-instar larval stage of pyrethroid-susceptible Helicoverpa armigera laboratory strain BK-77 assessed as mortality applied topically onto thorax measured after 48 hr
|
Helicoverpa armigera
|
0.05
microgAi/g
|
|
Journal : Pest Manag Sci
Title : Esterase-mediated resistance to pyrethroids in field populations of Helicoverpa armigera (Lepidoptera: Noctuidae) from Central Africa.
Year : 2009
Volume : 65
Issue : 10
First Page : 1147
Last Page : 1154
Authors : Achaleke J, Martin T, Ghogomu RT, Vaissayre M, Brévault T.
Abstract : BACKGROUND: Evolution of pyrethroid resistance in the cotton bollworm Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) threatens continued cotton production in Central Africa. Dose-response bioassays were conducted on area-wide collection of bollworm populations from major host plants, while biochemical techniques were used to evaluate basic mechanisms underlying resistance. RESULTS: Pyrethroid resistance is primarily associated with detoxification by enhanced esterase activity. High resistance to cypermethrin (RF = 67-1771), cross-resistance to deltamethrin (RF = 60-2972) and lack of cross-resistance to the non-ester pyrethroid etofenprox (RF = 2-10) were observed among H. armigera field populations and laboratory-selected strains. Enzymatic assays showed that esterase activity, but not oxidase content or glutathione-S-transferase activity, was positively correlated with resistance to cypermethrin. Pretreatment with piperonyl butoxide (PBO) resulted in significant synergism with cypermethrin in 6/10 field populations, but not in the laboratory-selected strain, indicating that additional mechanisms such as mixed-function oxidase (MFO) may be involved in field resistance. The absence of cross-resistance to DDT ruled out a possible target-site modification. CONCLUSION: Knowledge of the mechanisms involved in pyrethroid resistance and the lack of cross-resistance to spinosad and indoxacarb is a key to devising new resistance management strategies aimed at restoring the efficacy of pyrethroid-based programmes.
Genotoxicity in Drosophila melanogaster larvae at 7.50 to 10 mg/l
|
Drosophila melanogaster
|
None
|
|
Journal : Pest Manag Sci
Year : 2011
Volume : 67
Issue : 12
First Page : 1534
Last Page : 1540
Insecticidal activity against Bactrocera oleae adults assessed as death treated upto 192 hr at 24 +/- 1 degC, 60%RH
|
Bactrocera oleae
|
0.398
mg/L
|
|
Insecticidal activity against Bactrocera oleae adults assessed as death treated upto 192 hr at 24 +/- 1 degC, 60%RH
|
Bactrocera oleae
|
0.414
ug.mL-1
|
|
Journal : Pest Manag Sci
Year : 2011
Volume : 67
Issue : 12
First Page : 1534
Last Page : 1540
Insecticidal activity against Bactrocera oleae adults assessed as death treated upto 120 hr at 24 +/- 1 degC, 60%RH
|
Bactrocera oleae
|
0.161
mg/L
|
|
Insecticidal activity against Bactrocera oleae adults assessed as death treated upto 120 hr at 24 +/- 1 degC, 60%RH
|
Bactrocera oleae
|
0.176
ug.mL-1
|
|
Journal : Pest Manag Sci
Year : 2011
Volume : 67
Issue : 12
First Page : 1534
Last Page : 1540
Insecticidal activity against Bactrocera oleae adults assessed as death treated upto 24 hr at 24 +/- 1 degC, 60%RH
|
Bactrocera oleae
|
6.03
mg/L
|
|
Insecticidal activity against Bactrocera oleae adults assessed as death treated upto 24 hr at 24 +/- 1 degC, 60%RH
|
Bactrocera oleae
|
2.85
ug.mL-1
|
|
Journal : Pest Manag Sci
Year : 2011
Volume : 67
Issue : 12
First Page : 1534
Last Page : 1540
Insecticidal activity against Bactrocera oleae adults assessed as death treated upto 72 hr at 24 +/- 1 degC, 60%RH
|
Bactrocera oleae
|
1.0
mg/L
|
|
Insecticidal activity against Bactrocera oleae adults assessed as death treated upto 72 hr at 24 +/- 1 degC, 60%RH
|
Bactrocera oleae
|
0.344
ug.mL-1
|
|
Journal : Pest Manag Sci
Year : 2011
Volume : 67
Issue : 12
First Page : 1534
Last Page : 1540
Insecticidal activity against Drosophila melanogaster adults assessed as death treated upto 192 hr at 24 +/- 1 degC, 60%RH
|
Drosophila melanogaster
|
10.35
mg/L
|
|
Insecticidal activity against Drosophila melanogaster adults assessed as death treated upto 192 hr at 24 +/- 1 degC, 60%RH
|
Drosophila melanogaster
|
4.82
ug.mL-1
|
|
Journal : Pest Manag Sci
Year : 2011
Volume : 67
Issue : 12
First Page : 1534
Last Page : 1540
Insecticidal activity against Drosophila melanogaster adults assessed as death treated upto 120 hr at 24 +/- 1 degC, 60%RH
|
Drosophila melanogaster
|
13.6
mg/L
|
|
Insecticidal activity against Drosophila melanogaster adults assessed as death treated upto 120 hr at 24 +/- 1 degC, 60%RH
|
Drosophila melanogaster
|
7.24
ug.mL-1
|
|
Journal : Pest Manag Sci
Year : 2011
Volume : 67
Issue : 12
First Page : 1534
Last Page : 1540
Insecticidal activity against Drosophila melanogaster adults assessed as death treated upto 24 hr at 24 +/- 1 degC, 60%RH
|
Drosophila melanogaster
|
31.68
mg/L
|
|
Insecticidal activity against Drosophila melanogaster adults assessed as death treated upto 24 hr at 24 +/- 1 degC, 60%RH
|
Drosophila melanogaster
|
17.09
ug.mL-1
|
|
Journal : Pest Manag Sci
Year : 2011
Volume : 67
Issue : 12
First Page : 1534
Last Page : 1540
Insecticidal activity against Drosophila melanogaster adults assessed as death treated upto 72 hr at 24 +/- 1 degC, 60%RH
|
Drosophila melanogaster
|
14.59
mg/L
|
|
Insecticidal activity against Drosophila melanogaster adults assessed as death treated upto 72 hr at 24 +/- 1 degC, 60%RH
|
Drosophila melanogaster
|
8.03
ug.mL-1
|
|
Journal : Pest Manag Sci
Year : 2011
Volume : 67
Issue : 12
First Page : 1534
Last Page : 1540
Insecticidal activity against Drosophila melanogaster larvae assessed as death at 24 +/- 1 degC, 60%RH
|
Drosophila melanogaster
|
17.41
mg/L
|
|
Insecticidal activity against Drosophila melanogaster larvae assessed as death at 24 +/- 1 degC, 60%RH
|
Drosophila melanogaster
|
4.96
ug.mL-1
|
|
Journal : Pest Manag Sci
Year : 2011
Volume : 67
Issue : 12
First Page : 1534
Last Page : 1540
Cross resistant, ratio of LC50 for B-biotype thiamethoxam-resistant Bemisia tabaci (sweet potato whitefly) to LC50 for B-biotype thiamethoxam-sensitive Bemisia tabaci (sweet potato whitefly)
|
Bemisia tabaci
|
1.16
|
|
Journal : Pest Manag Sci
Title : Cross-resistance study and biochemical mechanisms of thiamethoxam resistance in B-biotype Bemisia tabaci (Hemiptera: Aleyrodidae).
Year : 2010
Volume : 66
Issue : 3
First Page : 313
Last Page : 318
Authors : Feng Y, Wu Q, Wang S, Chang X, Xie W, Xu B, Zhang Y.
Abstract : BACKGROUND: B-biotype Bemisia tabaci (Gennadius) has invaded China over the past two decades. To understand the risks and to determine possible mechanisms of resistance to thiamethoxam in B. tabaci, a resistant strain was selected in the laboratory. Cross-resistance and the biochemical mechanisms of thiamethoxam resistance were investigated in the present study. RESULTS: A 66.3-fold thiamethoxam-resistant B. tabaci strain (TH-R) was established after selection for 36 generations. Compared with the susceptible strain (TH-S), the selected TH-R strain showed obvious cross-resistance to imidacloprid (47.3-fold), acetamiprid (35.8-fold), nitenpyram (9.99-fold), abamectin (5.33-fold) and carbosulfan (4.43-fold). No cross-resistance to fipronil, chlorpyrifos or deltamethrin was seen. Piperonyl butoxide (PBO) and triphenyl phosphate (TPP) exhibited significant synergism on thiamethoxam effects in the TH-R strain (3.14- and 2.37-fold respectively). However, diethyl maleate (DEM) did not act synergistically with thiamethoxam. Biochemical assays showed that cytochrome P450 monooxygenase activities increased 1.21- and 1.68-fold respectively, and carboxylesterase activity increased 2.96-fold in the TH-R strain. However, no difference was observed for glutathione S-transferase between the two strains. CONCLUSION: B-biotype B. tabaci develops resistance to thiamethoxam. Cytochrome P450 monooxygenase and carboxylesterase appear to be responsible for the resistance. Reasonable resistance management that avoids the use of cross-resistance insecticides may delay the development of resistance to thiamethoxam in this species.
Insecticidal activity against B-biotype thiamethoxam-resistant Bemisia tabaci (sweet potato whitefly) in cabbage leaf assessed as mortality after 48 hr by leaf disk assay
|
Bemisia tabaci
|
810.0
ug.mL-1
|
|
Journal : Pest Manag Sci
Title : Cross-resistance study and biochemical mechanisms of thiamethoxam resistance in B-biotype Bemisia tabaci (Hemiptera: Aleyrodidae).
Year : 2010
Volume : 66
Issue : 3
First Page : 313
Last Page : 318
Authors : Feng Y, Wu Q, Wang S, Chang X, Xie W, Xu B, Zhang Y.
Abstract : BACKGROUND: B-biotype Bemisia tabaci (Gennadius) has invaded China over the past two decades. To understand the risks and to determine possible mechanisms of resistance to thiamethoxam in B. tabaci, a resistant strain was selected in the laboratory. Cross-resistance and the biochemical mechanisms of thiamethoxam resistance were investigated in the present study. RESULTS: A 66.3-fold thiamethoxam-resistant B. tabaci strain (TH-R) was established after selection for 36 generations. Compared with the susceptible strain (TH-S), the selected TH-R strain showed obvious cross-resistance to imidacloprid (47.3-fold), acetamiprid (35.8-fold), nitenpyram (9.99-fold), abamectin (5.33-fold) and carbosulfan (4.43-fold). No cross-resistance to fipronil, chlorpyrifos or deltamethrin was seen. Piperonyl butoxide (PBO) and triphenyl phosphate (TPP) exhibited significant synergism on thiamethoxam effects in the TH-R strain (3.14- and 2.37-fold respectively). However, diethyl maleate (DEM) did not act synergistically with thiamethoxam. Biochemical assays showed that cytochrome P450 monooxygenase activities increased 1.21- and 1.68-fold respectively, and carboxylesterase activity increased 2.96-fold in the TH-R strain. However, no difference was observed for glutathione S-transferase between the two strains. CONCLUSION: B-biotype B. tabaci develops resistance to thiamethoxam. Cytochrome P450 monooxygenase and carboxylesterase appear to be responsible for the resistance. Reasonable resistance management that avoids the use of cross-resistance insecticides may delay the development of resistance to thiamethoxam in this species.
Insecticidal activity against B-biotype thiamethoxam-sensitive Bemisia tabaci (sweet potato whitefly) in cabbage leaf assessed as mortality after 48 hr by leaf disk assay
|
Bemisia tabaci
|
701.0
ug.mL-1
|
|
Journal : Pest Manag Sci
Title : Cross-resistance study and biochemical mechanisms of thiamethoxam resistance in B-biotype Bemisia tabaci (Hemiptera: Aleyrodidae).
Year : 2010
Volume : 66
Issue : 3
First Page : 313
Last Page : 318
Authors : Feng Y, Wu Q, Wang S, Chang X, Xie W, Xu B, Zhang Y.
Abstract : BACKGROUND: B-biotype Bemisia tabaci (Gennadius) has invaded China over the past two decades. To understand the risks and to determine possible mechanisms of resistance to thiamethoxam in B. tabaci, a resistant strain was selected in the laboratory. Cross-resistance and the biochemical mechanisms of thiamethoxam resistance were investigated in the present study. RESULTS: A 66.3-fold thiamethoxam-resistant B. tabaci strain (TH-R) was established after selection for 36 generations. Compared with the susceptible strain (TH-S), the selected TH-R strain showed obvious cross-resistance to imidacloprid (47.3-fold), acetamiprid (35.8-fold), nitenpyram (9.99-fold), abamectin (5.33-fold) and carbosulfan (4.43-fold). No cross-resistance to fipronil, chlorpyrifos or deltamethrin was seen. Piperonyl butoxide (PBO) and triphenyl phosphate (TPP) exhibited significant synergism on thiamethoxam effects in the TH-R strain (3.14- and 2.37-fold respectively). However, diethyl maleate (DEM) did not act synergistically with thiamethoxam. Biochemical assays showed that cytochrome P450 monooxygenase activities increased 1.21- and 1.68-fold respectively, and carboxylesterase activity increased 2.96-fold in the TH-R strain. However, no difference was observed for glutathione S-transferase between the two strains. CONCLUSION: B-biotype B. tabaci develops resistance to thiamethoxam. Cytochrome P450 monooxygenase and carboxylesterase appear to be responsible for the resistance. Reasonable resistance management that avoids the use of cross-resistance insecticides may delay the development of resistance to thiamethoxam in this species.
Effect on life span in Nilaparvata lugens (brown planthopper) adult at 0.00064 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
120.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Effect on life span in Nilaparvata lugens (brown planthopper) adult at 0.016 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
102.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Effect on life span in Nilaparvata lugens (brown planthopper) adult at 0.4 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
125.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Effect on life span in Nilaparvata lugens (brown planthopper) adult at 10 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
112.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Effect on development of ovarioles in Nilaparvata lugens (brown planthopper) assessed as number of ovarioles at 0.00064 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
102.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Effect on development of ovarioles in Nilaparvata lugens (brown planthopper) assessed as number of ovarioles at 0.016 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
133.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Effect on development of ovarioles in Nilaparvata lugens (brown planthopper) assessed as number of ovarioles at 0.4 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
114.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Effect on egg maturity in Nilaparvata lugens (brown planthopper) at 0.00064 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
110.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Effect on egg maturity in Nilaparvata lugens (brown planthopper) at 0.016 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
131.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Effect on egg maturity in Nilaparvata lugens (brown planthopper) at 0.4 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
113.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Effect on hatchability in Nilaparvata lugens (brown planthopper) at 0.016 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
98.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Effect on hatchability in Nilaparvata lugens (brown planthopper) at 0.08 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
98.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Effect on hatchability in Nilaparvata lugens (brown planthopper) at 0.4 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
94.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Effect on hatchability in Nilaparvata lugens (brown planthopper) at 2 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
92.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Effect on hatchability in Nilaparvata lugens (brown planthopper) at 10 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
98.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Effect on oviposition in Nilaparvata lugens (brown planthopper) assessed as eggs laid at 0.0000256 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
107.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Effect on oviposition in Nilaparvata lugens (brown planthopper) assessed as eggs laid at 0.000128 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
105.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Effect on oviposition in Nilaparvata lugens (brown planthopper) assessed as eggs laid at 0.0032 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
136.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Effect on oviposition in Nilaparvata lugens (brown planthopper) assessed as eggs laid at 0.00064 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
116.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Effect on oviposition in Nilaparvata lugens (brown planthopper) assessed as eggs laid at 0.08 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
112.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Effect on oviposition in Nilaparvata lugens (brown planthopper) assessed as eggs laid at 0.016 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
128.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Effect on oviposition in Nilaparvata lugens (brown planthopper) assessed as eggs laid at 0.4 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
124.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Effect on oviposition in Nilaparvata lugens (brown planthopper) assessed as eggs laid at 2 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
109.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Effect on oviposition in Nilaparvata lugens (brown planthopper) assessed as eggs laid at 10 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
101.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Insecticidal activity against Nilaparvata lugens (brown planthopper) assessed as mortality at 0.0000256 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
4.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Insecticidal activity against Nilaparvata lugens (brown planthopper) assessed as mortality at 0.000128 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
0.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Insecticidal activity against Nilaparvata lugens (brown planthopper) assessed as mortality at 0.00064 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
4.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Insecticidal activity against Nilaparvata lugens (brown planthopper) assessed as mortality at 0.0032 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
0.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Insecticidal activity against Nilaparvata lugens (brown planthopper) assessed as mortality at 0.016 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
9.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Insecticidal activity against Nilaparvata lugens (brown planthopper) assessed as mortality at 0.08 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
2.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Insecticidal activity against Nilaparvata lugens (brown planthopper) assessed as mortality at 0.4 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
9.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Insecticidal activity against Nilaparvata lugens (brown planthopper) assessed as mortality at 2 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
4.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Insecticidal activity against Nilaparvata lugens (brown planthopper) assessed as mortality at 10 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
40.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Insecticidal activity against Nilaparvata lugens (brown planthopper) assessed as mortality at 50 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
100.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Insecticidal activity against Nilaparvata lugens (brown planthopper) emerged female adult assessed as mortality at 0.0000256 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
4.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Insecticidal activity against Nilaparvata lugens (brown planthopper) emerged female adult assessed as mortality at 0.000128 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
0.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Insecticidal activity against Nilaparvata lugens (brown planthopper) emerged female adult assessed as mortality at 0.0032 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
0.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Insecticidal activity against Nilaparvata lugens (brown planthopper) emerged female adult assessed as mortality at 0.00064 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
4.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Insecticidal activity against Nilaparvata lugens (brown planthopper) emerged female adult assessed as mortality at 0.016 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
9.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Insecticidal activity against Nilaparvata lugens (brown planthopper) emerged female adult assessed as mortality at 0.08 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
0.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Insecticidal activity against Nilaparvata lugens (brown planthopper) emerged female adult assessed as mortality at 0.4 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
0.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Insecticidal activity against Nilaparvata lugens (brown planthopper) emerged female adult assessed as mortality at 2 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
0.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Insecticidal activity against Nilaparvata lugens (brown planthopper) emerged female adult assessed as mortality at 10 ppm measured after 7 days relative to control
|
Nilaparvata lugens
|
0.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Insecticidal activity against Nilaparvata lugens (brown planthopper) fifth-instar nymphs assessed as mortality at 0.0000256 ppm measured after 7 days
|
Nilaparvata lugens
|
0.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Insecticidal activity against Nilaparvata lugens (brown planthopper) fifth-instar nymphs assessed as mortality at 0.000128 ppm measured after 7 days
|
Nilaparvata lugens
|
0.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Insecticidal activity against Nilaparvata lugens (brown planthopper) fifth-instar nymphs assessed as mortality at 0.00064 ppm measured after 7 days
|
Nilaparvata lugens
|
0.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Insecticidal activity against Nilaparvata lugens (brown planthopper) fifth-instar nymphs assessed as mortality at 0.0032 ppm measured after 7 days
|
Nilaparvata lugens
|
0.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Insecticidal activity against Nilaparvata lugens (brown planthopper) fifth-instar nymphs assessed as mortality at 0.08 ppm measured after 7 days
|
Nilaparvata lugens
|
2.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Insecticidal activity against Nilaparvata lugens (brown planthopper) fifth-instar nymphs assessed as mortality at 0.016 ppm measured after 7 days
|
Nilaparvata lugens
|
0.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Insecticidal activity against Nilaparvata lugens (brown planthopper) fifth-instar nymphs assessed as mortality at 0.4 ppm measured after 7 days
|
Nilaparvata lugens
|
9.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Insecticidal activity against Nilaparvata lugens (brown planthopper) fifth-instar nymphs assessed as mortality at 2 ppm measured after 7 days
|
Nilaparvata lugens
|
4.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Insecticidal activity against Nilaparvata lugens (brown planthopper) fifth-instar nymphs assessed as mortality at 10 ppm measured after 7 days
|
Nilaparvata lugens
|
40.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157
Insecticidal activity against Nilaparvata lugens (brown planthopper) fifth-instar nymphs assessed as mortality at 50 ppm measured after 7 days
|
Nilaparvata lugens
|
100.0
%
|
|
Journal : J Pesticide Sci
Year : 1996
Volume : 21
Issue : 2
First Page : 153
Last Page : 157