|
Insecticidal activity against Plutella xylostella (diamondback moth) third-instar larvae measured 24 hr post dose by leaf disk dipping assay
|
Plutella xylostella
|
21.39
ug.mL-1
|
|
Journal : J Agric Food Chem
Year : 2011
Volume : 59
Issue : 23
First Page : 12534
Last Page : 12542
|
Phloem mobility in Ricinus communis (castor bean) seedlings phloem sap assessed as drug level at 200 uM by HPLC-MS method
|
Ricinus communis
|
None
|
|
Journal : J Agric Food Chem
Year : 2011
Volume : 59
Issue : 23
First Page : 12534
Last Page : 12542
|
Phloem mobility in Ricinus communis (castor bean) seedlings phloem sap assessed as drug level at 200 uM measured 8 hr post dose by DiBAC4 indicator based flow cytometry
|
Ricinus communis
|
None
|
|
Journal : J Agric Food Chem
Year : 2011
Volume : 59
Issue : 23
First Page : 12534
Last Page : 12542
|
Insecticidal activity against Plutella xylostella assessed as mortality at 5 mg/L measured after 72 hr
|
Plutella xylostella
|
100.0
%
|
|
Journal : J Agric Food Chem
Year : 2010
Volume : 58
Issue : 5
First Page : 3037
Last Page : 3042
|
Residual toxicity against compound treated rice leaves-fed adult Anagrus nilaparvatae assessed as mortality measured on day 7 post insecticide treatment to plant
|
Anagrus
|
50.0
%
|
|
Journal : Crop Protection
Title : Assessment of the impact of insecticides on Anagrus nilaparvatae (Pang et Wang) (Hymenoptera: Mymanidae), an egg parasitoid of the rice planthopper, Nilaparvata lugens (Hemiptera: Delphacidae)
Year : 2008
Volume : 27
Issue : 3
First Page : 514
Last Page : 522
Authors : Wang HuaiYin, Yang Yang, Su JianYa, Shen JinLiang, Gao CongFen, Zhu YuCheng.
Abstract : The parasitoid, Anagrus nilaparvatae (Pang et Wang), is a major natural enemy of the rice planthopper Nilaparvata lugens. It plays an important role in the integrated pest management (IPM) of the rice planthopper, although chemical control is also effective. However, compatibility of biological and chemical control has never been investigated with this system. This study was designed to assess potential insecticide toxicities to the wasps, including acute and residual toxicity through contact and oral ingestion. Fourteen insecticides, including organophosphates, carbamates, pyrethroids, insect growth regulators (IGRs), neonicotine, phenylpyrazole, and antibiotics were selected to test their toxicities against the adult parasitoid. Median lethal concentration (LC₅₀) of each insecticide was first determined. Acute contact toxicity tests indicated that chlorpyrifos had the highest toxicity to the wasp, requiring the least chemical to achieve 50% mortality. Imidacloprid was the second most toxic insecticide, while IGRs had the lowest toxicity. Results of oral toxicity tests of 14 pesticides showed that dichlorvos was the most toxic, which generated 100% mortality only 2h after treatment. Isoprocarb, imidacloprid, and thiamethoxam were the second most toxic insecticides and killed all wasps in a 4-h period. Residual toxicity results indicated that imidacloprid was the most persistent insecticide, and it retained residual toxicity (80.7% mortality) on rice leaves up to 7d after treatment. Thiamethoxam, triazophos, and fipronil also had long residual toxicity to the wasps with 7-d mortalities as 66.8%, 54.6%, and 50.0%, respectively. IGRs showed very low contact and residual toxicity, but exhibited certain chronic effects of oral toxicity on longevity, fecundity, and offspring emergence.
|
Acute oral toxicity against female adult Anagrus nilaparvatae in petridish under laboratory conditions assessed as mortality compound treated as emulsible concentrate with acetone and Triton X-100 measured after 8 hr
|
Anagrus
|
100.0
%
|
|
Journal : Crop Protection
Title : Assessment of the impact of insecticides on Anagrus nilaparvatae (Pang et Wang) (Hymenoptera: Mymanidae), an egg parasitoid of the rice planthopper, Nilaparvata lugens (Hemiptera: Delphacidae)
Year : 2008
Volume : 27
Issue : 3
First Page : 514
Last Page : 522
Authors : Wang HuaiYin, Yang Yang, Su JianYa, Shen JinLiang, Gao CongFen, Zhu YuCheng.
Abstract : The parasitoid, Anagrus nilaparvatae (Pang et Wang), is a major natural enemy of the rice planthopper Nilaparvata lugens. It plays an important role in the integrated pest management (IPM) of the rice planthopper, although chemical control is also effective. However, compatibility of biological and chemical control has never been investigated with this system. This study was designed to assess potential insecticide toxicities to the wasps, including acute and residual toxicity through contact and oral ingestion. Fourteen insecticides, including organophosphates, carbamates, pyrethroids, insect growth regulators (IGRs), neonicotine, phenylpyrazole, and antibiotics were selected to test their toxicities against the adult parasitoid. Median lethal concentration (LC₅₀) of each insecticide was first determined. Acute contact toxicity tests indicated that chlorpyrifos had the highest toxicity to the wasp, requiring the least chemical to achieve 50% mortality. Imidacloprid was the second most toxic insecticide, while IGRs had the lowest toxicity. Results of oral toxicity tests of 14 pesticides showed that dichlorvos was the most toxic, which generated 100% mortality only 2h after treatment. Isoprocarb, imidacloprid, and thiamethoxam were the second most toxic insecticides and killed all wasps in a 4-h period. Residual toxicity results indicated that imidacloprid was the most persistent insecticide, and it retained residual toxicity (80.7% mortality) on rice leaves up to 7d after treatment. Thiamethoxam, triazophos, and fipronil also had long residual toxicity to the wasps with 7-d mortalities as 66.8%, 54.6%, and 50.0%, respectively. IGRs showed very low contact and residual toxicity, but exhibited certain chronic effects of oral toxicity on longevity, fecundity, and offspring emergence.
|
Acute contact toxicity against adult Anagrus nilaparvatae assessed as dead parasitoid wasps compound treated for 1 hr measured after 8 hr wash-out period
|
Anagrus
|
0.18
mgAi/L
|
|
Journal : Crop Protection
Title : Assessment of the impact of insecticides on Anagrus nilaparvatae (Pang et Wang) (Hymenoptera: Mymanidae), an egg parasitoid of the rice planthopper, Nilaparvata lugens (Hemiptera: Delphacidae)
Year : 2008
Volume : 27
Issue : 3
First Page : 514
Last Page : 522
Authors : Wang HuaiYin, Yang Yang, Su JianYa, Shen JinLiang, Gao CongFen, Zhu YuCheng.
Abstract : The parasitoid, Anagrus nilaparvatae (Pang et Wang), is a major natural enemy of the rice planthopper Nilaparvata lugens. It plays an important role in the integrated pest management (IPM) of the rice planthopper, although chemical control is also effective. However, compatibility of biological and chemical control has never been investigated with this system. This study was designed to assess potential insecticide toxicities to the wasps, including acute and residual toxicity through contact and oral ingestion. Fourteen insecticides, including organophosphates, carbamates, pyrethroids, insect growth regulators (IGRs), neonicotine, phenylpyrazole, and antibiotics were selected to test their toxicities against the adult parasitoid. Median lethal concentration (LC₅₀) of each insecticide was first determined. Acute contact toxicity tests indicated that chlorpyrifos had the highest toxicity to the wasp, requiring the least chemical to achieve 50% mortality. Imidacloprid was the second most toxic insecticide, while IGRs had the lowest toxicity. Results of oral toxicity tests of 14 pesticides showed that dichlorvos was the most toxic, which generated 100% mortality only 2h after treatment. Isoprocarb, imidacloprid, and thiamethoxam were the second most toxic insecticides and killed all wasps in a 4-h period. Residual toxicity results indicated that imidacloprid was the most persistent insecticide, and it retained residual toxicity (80.7% mortality) on rice leaves up to 7d after treatment. Thiamethoxam, triazophos, and fipronil also had long residual toxicity to the wasps with 7-d mortalities as 66.8%, 54.6%, and 50.0%, respectively. IGRs showed very low contact and residual toxicity, but exhibited certain chronic effects of oral toxicity on longevity, fecundity, and offspring emergence.
|
Risk quotient, recommended field rate (g/ha) to LC50 for Trichogramma nubilale (mg/L)
|
Trichogramma nubilale
|
77.6
|
|
Journal : Crop Protection
Title : Susceptibility of adult Trichogramma nubilale (Hymenoptera: Trichogrammatidae) to selected insecticides with different modes of action
Year : 2012
Volume : 34
First Page : 76
Last Page : 72
Authors : Wang Y, Yu R, Zhao X, Chen L, Wu C, Cang T, Wang Q.
Abstract : The parasitic wasp Trichogramma nubilale (Hymenoptera: Trichogrammatidae) is one of the most suitable parasitoids for controlling Asian corn borer, Ostrinia furnacalis (Lepidoptera: Crambidae). Although extensive toxicological tests have been carried out to elucidate the toxicities of insecticides to trichogrammatids, the acute toxicity risks of commonly used insecticides to T. nubilale are not well known. Among the 7 classes of tested chemicals, organophosphates and carbamates had the highest intrinsic toxicity to the parasitoid with LC50 values ranging from 0.081 (0.062–0.12) to 2.10 (1.23–3.47) and from 0.12 (0.11–0.14) to 0.95 (0.87–1.05) mg a.i. per liter, respectively. The phenylpyrazoles (with the exception of butene-fipronil), avermectins, neonicotinoids and pyrethroids induced intermediate toxicity responses with LC50 values ranging from 0.29 to 4.67, 2.36 to 11.27, 1.86 to 311.9, and 10.98–150.3 mg a.i. per liter, respectively. In contrast, insect growth regulators (IGRs) exhibited the least toxicity to the parasitoid with LC50 values ranging from 3452 (3114–3877) to 10,168 (8848–12,027) mg a.i. per liter. A risk quotient analysis indicated that neonicotinoids, avermectins, pyrethroids, IGRs and phenylpyrazoles (with the exception of butene-fipronil) were safe, but organophosphates and carbamates were slightly to moderately toxic or highly toxic to T. nubilale. This study provided informative data for implementing both biological and chemical control strategies in integrated pest management (IPM) of corn lepidopterans.
|
Contact toxicity against Trichogramma nubilale assessed as mortality after 24 hr by modified slight dry film method
|
Trichogramma nubilale
|
1.82
mgAi/L
|
|
Contact toxicity against Trichogramma nubilale assessed as mortality after 24 hr by modified slight dry film method
|
Trichogramma nubilale
|
0.29
mgAi/L
|
|
Journal : Crop Protection
Title : Susceptibility of adult Trichogramma nubilale (Hymenoptera: Trichogrammatidae) to selected insecticides with different modes of action
Year : 2012
Volume : 34
First Page : 76
Last Page : 72
Authors : Wang Y, Yu R, Zhao X, Chen L, Wu C, Cang T, Wang Q.
Abstract : The parasitic wasp Trichogramma nubilale (Hymenoptera: Trichogrammatidae) is one of the most suitable parasitoids for controlling Asian corn borer, Ostrinia furnacalis (Lepidoptera: Crambidae). Although extensive toxicological tests have been carried out to elucidate the toxicities of insecticides to trichogrammatids, the acute toxicity risks of commonly used insecticides to T. nubilale are not well known. Among the 7 classes of tested chemicals, organophosphates and carbamates had the highest intrinsic toxicity to the parasitoid with LC50 values ranging from 0.081 (0.062–0.12) to 2.10 (1.23–3.47) and from 0.12 (0.11–0.14) to 0.95 (0.87–1.05) mg a.i. per liter, respectively. The phenylpyrazoles (with the exception of butene-fipronil), avermectins, neonicotinoids and pyrethroids induced intermediate toxicity responses with LC50 values ranging from 0.29 to 4.67, 2.36 to 11.27, 1.86 to 311.9, and 10.98–150.3 mg a.i. per liter, respectively. In contrast, insect growth regulators (IGRs) exhibited the least toxicity to the parasitoid with LC50 values ranging from 3452 (3114–3877) to 10,168 (8848–12,027) mg a.i. per liter. A risk quotient analysis indicated that neonicotinoids, avermectins, pyrethroids, IGRs and phenylpyrazoles (with the exception of butene-fipronil) were safe, but organophosphates and carbamates were slightly to moderately toxic or highly toxic to T. nubilale. This study provided informative data for implementing both biological and chemical control strategies in integrated pest management (IPM) of corn lepidopterans.
|
Hydrophobicity, log P of the compound in octanol-water by shaking-flask method
|
None
|
4.0
|
|
Journal : J Agric Food Chem
Title : Importance of physicochemical properties for the design of new pesticides.
Year : 2011
Volume : 59
Issue : 7
First Page : 2909
Last Page : 2917
Authors : Akamatsu M.
Abstract : The physicochemical properties of candidate compounds play important roles in the design of new pesticides. Pesticides must be absorbed by pests, be transported to the target site, and then interact with proteins. Hydrophobicity is very important for these processes. Log P, where P is the partition coefficient in the 1-octanol/water system, is commonly used as a hydrophobic descriptor and correlates with membrane permeation and transport. It was recently reported that permeability by the parallel artificial membrane permeation assay (PAMPA) could be used to predict human oral absorption of passively transported compounds. PAMPA, which is a rapid high-throughput screening system, may be useful to predict pesticide absorption because PAMPA permeability can be calculated using log P and other parameters. Electronic and structural properties as well as hydrophobicity are important factors for protein-ligand interaction. To show the importance of physicochemical properties, the classic QSAR and CoMFA of neonicotinoids and prediction of bioavailability of pesticides in terms of membrane permeability in comparison with drugs are described.
|
Ratio of LC50 for third-instar Apolygus lucorum reared in asparagus bean pod at 20 degC to LC50 for third-instar Apolygus lucorum reared in asparagus bean pod at 15 degC
|
Apolygus lucorum
|
5.76
|
|
Journal : J Pesticide Sci
Year : 2012
Volume : 37
Issue : 2
First Page : 135
Last Page : 139
|
Ratio of LC50 for third-instar Apolygus lucorum reared in asparagus bean pod at 15 degC to LC50 for third-instar Apolygus lucorum reared in asparagus bean pod at 35 degC
|
Apolygus lucorum
|
3.4
|
|
Journal : J Pesticide Sci
Year : 2012
Volume : 37
Issue : 2
First Page : 135
Last Page : 139
|
Ratio of LC50 for third-instar Apolygus lucorum reared in asparagus bean pod at 15 degC to LC50 for third-instar Apolygus lucorum reared in asparagus bean pod at 30 degC
|
Apolygus lucorum
|
1.03
|
|
Journal : J Pesticide Sci
Year : 2012
Volume : 37
Issue : 2
First Page : 135
Last Page : 139
|
Ratio of LC50 for third-instar Apolygus lucorum reared in asparagus bean pod at 25 degC to LC50 for third-instar Apolygus lucorum reared in asparagus bean pod at 15 degC
|
Apolygus lucorum
|
2.12
|
|
Journal : J Pesticide Sci
Year : 2012
Volume : 37
Issue : 2
First Page : 135
Last Page : 139
|
Insecticidal activity against third-instar Apolygus lucorum reared in asparagus bean pod assessed as mortality administered by dipping pods in compound solution measured after 48 hr at 35 degC
|
Apolygus lucorum
|
0.1
ug.mL-1
|
|
Journal : J Pesticide Sci
Year : 2012
Volume : 37
Issue : 2
First Page : 135
Last Page : 139
|
Insecticidal activity against third-instar Apolygus lucorum reared in asparagus bean pod assessed as mortality administered by dipping pods in compound solution measured after 48 hr at 30 degC
|
Apolygus lucorum
|
0.33
ug.mL-1
|
|
Journal : J Pesticide Sci
Year : 2012
Volume : 37
Issue : 2
First Page : 135
Last Page : 139
|
Insecticidal activity against third-instar Apolygus lucorum reared in asparagus bean pod assessed as mortality administered by dipping pods in compound solution measured after 48 hr at 25 degC
|
Apolygus lucorum
|
0.72
ug.mL-1
|
|
Journal : J Pesticide Sci
Year : 2012
Volume : 37
Issue : 2
First Page : 135
Last Page : 139
|
Insecticidal activity against third-instar Apolygus lucorum reared in asparagus bean pod assessed as mortality administered by dipping pods in compound solution measured after 48 hr at 20 degC
|
Apolygus lucorum
|
1.69
ug.mL-1
|
|
Journal : J Pesticide Sci
Year : 2012
Volume : 37
Issue : 2
First Page : 135
Last Page : 139
|
Insecticidal activity against third-instar Apolygus lucorum reared in asparagus bean pod assessed as mortality administered by dipping pods in compound solution measured after 48 hr at 15 degC
|
Apolygus lucorum
|
0.34
ug.mL-1
|
|
Journal : J Pesticide Sci
Year : 2012
Volume : 37
Issue : 2
First Page : 135
Last Page : 139
|
Ratio of EC50 for Daphnia magna to EC50 for first instar larvae of Cheumatopsyche brevilineata
|
None
|
3.09
|
|
Journal : J Pesticide Sci
Title : A useful new insecticide bioassay using first-instar larvae of a net-spinning caddisfly, Cheumatopsyche brevilineata (Trichoptera: Hydropsychidae)
Year : 2009
Volume : 34
Issue : 1
First Page : 13
Last Page : 20
Authors : Yokoyama A, Ohtsu K, Iwafune T, Nagai T, Ishihara S, Kobara Y, Horio T, Endo S
|
Insecticidal activity against first-instar larvae of Cheumatopsyche brevilineata after 48 hr
|
Cheumatopsyche
|
0.000153
ug.mL-1
|
|
Journal : J Pesticide Sci
Title : A useful new insecticide bioassay using first-instar larvae of a net-spinning caddisfly, Cheumatopsyche brevilineata (Trichoptera: Hydropsychidae)
Year : 2009
Volume : 34
Issue : 1
First Page : 13
Last Page : 20
Authors : Yokoyama A, Ohtsu K, Iwafune T, Nagai T, Ishihara S, Kobara Y, Horio T, Endo S
|
Octanol-water partition coefficient, log KOW of the compound
|
None
|
4.0
|
|
Journal : J Pesticide Sci
Title : A useful new insecticide bioassay using first-instar larvae of a net-spinning caddisfly, Cheumatopsyche brevilineata (Trichoptera: Hydropsychidae)
Year : 2009
Volume : 34
Issue : 1
First Page : 13
Last Page : 20
Authors : Yokoyama A, Ohtsu K, Iwafune T, Nagai T, Ishihara S, Kobara Y, Horio T, Endo S
|
Insecticidal activity against Daphnia magna after 48 hr
|
Daphnia magna
|
0.19
ug.mL-1
|
|
Journal : J Pesticide Sci
Title : A useful new insecticide bioassay using first-instar larvae of a net-spinning caddisfly, Cheumatopsyche brevilineata (Trichoptera: Hydropsychidae)
Year : 2009
Volume : 34
Issue : 1
First Page : 13
Last Page : 20
Authors : Yokoyama A, Ohtsu K, Iwafune T, Nagai T, Ishihara S, Kobara Y, Horio T, Endo S
|
Insecticidal activity against Bemisia tabaci (sweet potato whitefly) infested cabbage leaves assessed as mortality after 48 hr by leaf dip method
|
Bemisia tabaci
|
3.82
ug.mL-1
|
|
Journal : Pest Manag Sci
Title : Induction effects of host plants on insecticide susceptibility and detoxification enzymes of Bemisia tabaci (Hemiptera: Aleyrodidae).
Year : 2011
Volume : 67
Issue : 1
First Page : 87
Last Page : 93
Authors : Xie W, Wang S, Wu Q, Feng Y, Pan H, Jiao X, Zhou L, Yang X, Fu W, Teng H, Xu B, Zhang Y.
Abstract : BACKGROUND: The polyphagous B-biotype Bemisia tabaci (Gennadius) has developed a high resistance to commonly used insecticides in China. To illustrate the induced changes by host plant, bioassay and biochemical research on five different host populations were investigated. RESULTS: Except for bifenthrin, all tested insecticides showed lower toxicity to the B. tabaci poinsettia population compared with other host populations. Moreover, four insecticides, the exceptions being abamectin and fipronil, showed highest toxicity towards the tomato population. The LC(50) values of the poinsettia population, particularly towards acetamiprid, were 14.8-, 10.3- and 7.29-fold higher than those of tomato, cucumber and cabbage respectively. The CarE activities of B. tabaci cabbage and cucumber populations were all significantly higher than those of poinsettia, cotton and tomato populations. The ratio of the cabbage population was 1.97-, 1.79- and 1.30-fold higher than that of poinsettia, cotton and tomato respectively. The frequency profiles for this activity also have obvious differences. The GST and P450 activities of the cucumber population were the lowest in the five host populations. CONCLUSION: Long-term induction of host plants for B-biotype B. tabaci could influence their susceptibilities to several insecticides. Rational selection and usage of insecticides for particular hosts will be helpful for resistance management and control of this species.
|
Insecticidal activity against Bemisia tabaci (sweet potato whitefly) infested tomato leaves assessed as mortality after 48 hr by leaf dip method
|
Bemisia tabaci
|
5.96
ug.mL-1
|
|
Journal : Pest Manag Sci
Title : Induction effects of host plants on insecticide susceptibility and detoxification enzymes of Bemisia tabaci (Hemiptera: Aleyrodidae).
Year : 2011
Volume : 67
Issue : 1
First Page : 87
Last Page : 93
Authors : Xie W, Wang S, Wu Q, Feng Y, Pan H, Jiao X, Zhou L, Yang X, Fu W, Teng H, Xu B, Zhang Y.
Abstract : BACKGROUND: The polyphagous B-biotype Bemisia tabaci (Gennadius) has developed a high resistance to commonly used insecticides in China. To illustrate the induced changes by host plant, bioassay and biochemical research on five different host populations were investigated. RESULTS: Except for bifenthrin, all tested insecticides showed lower toxicity to the B. tabaci poinsettia population compared with other host populations. Moreover, four insecticides, the exceptions being abamectin and fipronil, showed highest toxicity towards the tomato population. The LC(50) values of the poinsettia population, particularly towards acetamiprid, were 14.8-, 10.3- and 7.29-fold higher than those of tomato, cucumber and cabbage respectively. The CarE activities of B. tabaci cabbage and cucumber populations were all significantly higher than those of poinsettia, cotton and tomato populations. The ratio of the cabbage population was 1.97-, 1.79- and 1.30-fold higher than that of poinsettia, cotton and tomato respectively. The frequency profiles for this activity also have obvious differences. The GST and P450 activities of the cucumber population were the lowest in the five host populations. CONCLUSION: Long-term induction of host plants for B-biotype B. tabaci could influence their susceptibilities to several insecticides. Rational selection and usage of insecticides for particular hosts will be helpful for resistance management and control of this species.
|
Insecticidal activity against Bemisia tabaci (sweet potato whitefly) infested cucumber leaves assessed as mortality after 48 hr by leaf dip method
|
Bemisia tabaci
|
8.79
ug.mL-1
|
|
Journal : Pest Manag Sci
Title : Induction effects of host plants on insecticide susceptibility and detoxification enzymes of Bemisia tabaci (Hemiptera: Aleyrodidae).
Year : 2011
Volume : 67
Issue : 1
First Page : 87
Last Page : 93
Authors : Xie W, Wang S, Wu Q, Feng Y, Pan H, Jiao X, Zhou L, Yang X, Fu W, Teng H, Xu B, Zhang Y.
Abstract : BACKGROUND: The polyphagous B-biotype Bemisia tabaci (Gennadius) has developed a high resistance to commonly used insecticides in China. To illustrate the induced changes by host plant, bioassay and biochemical research on five different host populations were investigated. RESULTS: Except for bifenthrin, all tested insecticides showed lower toxicity to the B. tabaci poinsettia population compared with other host populations. Moreover, four insecticides, the exceptions being abamectin and fipronil, showed highest toxicity towards the tomato population. The LC(50) values of the poinsettia population, particularly towards acetamiprid, were 14.8-, 10.3- and 7.29-fold higher than those of tomato, cucumber and cabbage respectively. The CarE activities of B. tabaci cabbage and cucumber populations were all significantly higher than those of poinsettia, cotton and tomato populations. The ratio of the cabbage population was 1.97-, 1.79- and 1.30-fold higher than that of poinsettia, cotton and tomato respectively. The frequency profiles for this activity also have obvious differences. The GST and P450 activities of the cucumber population were the lowest in the five host populations. CONCLUSION: Long-term induction of host plants for B-biotype B. tabaci could influence their susceptibilities to several insecticides. Rational selection and usage of insecticides for particular hosts will be helpful for resistance management and control of this species.
|
Insecticidal activity against Bemisia tabaci (sweet potato whitefly) infested cotton leaves assessed as mortality after 48 hr by leaf dip method
|
Bemisia tabaci
|
3.51
ug.mL-1
|
|
Journal : Pest Manag Sci
Title : Induction effects of host plants on insecticide susceptibility and detoxification enzymes of Bemisia tabaci (Hemiptera: Aleyrodidae).
Year : 2011
Volume : 67
Issue : 1
First Page : 87
Last Page : 93
Authors : Xie W, Wang S, Wu Q, Feng Y, Pan H, Jiao X, Zhou L, Yang X, Fu W, Teng H, Xu B, Zhang Y.
Abstract : BACKGROUND: The polyphagous B-biotype Bemisia tabaci (Gennadius) has developed a high resistance to commonly used insecticides in China. To illustrate the induced changes by host plant, bioassay and biochemical research on five different host populations were investigated. RESULTS: Except for bifenthrin, all tested insecticides showed lower toxicity to the B. tabaci poinsettia population compared with other host populations. Moreover, four insecticides, the exceptions being abamectin and fipronil, showed highest toxicity towards the tomato population. The LC(50) values of the poinsettia population, particularly towards acetamiprid, were 14.8-, 10.3- and 7.29-fold higher than those of tomato, cucumber and cabbage respectively. The CarE activities of B. tabaci cabbage and cucumber populations were all significantly higher than those of poinsettia, cotton and tomato populations. The ratio of the cabbage population was 1.97-, 1.79- and 1.30-fold higher than that of poinsettia, cotton and tomato respectively. The frequency profiles for this activity also have obvious differences. The GST and P450 activities of the cucumber population were the lowest in the five host populations. CONCLUSION: Long-term induction of host plants for B-biotype B. tabaci could influence their susceptibilities to several insecticides. Rational selection and usage of insecticides for particular hosts will be helpful for resistance management and control of this species.
|
Insecticidal activity against Bemisia tabaci (sweet potato whitefly) infested poinsettia leaves assessed as mortality after 48 hr by leaf dip method
|
Bemisia tabaci
|
9.13
ug.mL-1
|
|
Journal : Pest Manag Sci
Title : Induction effects of host plants on insecticide susceptibility and detoxification enzymes of Bemisia tabaci (Hemiptera: Aleyrodidae).
Year : 2011
Volume : 67
Issue : 1
First Page : 87
Last Page : 93
Authors : Xie W, Wang S, Wu Q, Feng Y, Pan H, Jiao X, Zhou L, Yang X, Fu W, Teng H, Xu B, Zhang Y.
Abstract : BACKGROUND: The polyphagous B-biotype Bemisia tabaci (Gennadius) has developed a high resistance to commonly used insecticides in China. To illustrate the induced changes by host plant, bioassay and biochemical research on five different host populations were investigated. RESULTS: Except for bifenthrin, all tested insecticides showed lower toxicity to the B. tabaci poinsettia population compared with other host populations. Moreover, four insecticides, the exceptions being abamectin and fipronil, showed highest toxicity towards the tomato population. The LC(50) values of the poinsettia population, particularly towards acetamiprid, were 14.8-, 10.3- and 7.29-fold higher than those of tomato, cucumber and cabbage respectively. The CarE activities of B. tabaci cabbage and cucumber populations were all significantly higher than those of poinsettia, cotton and tomato populations. The ratio of the cabbage population was 1.97-, 1.79- and 1.30-fold higher than that of poinsettia, cotton and tomato respectively. The frequency profiles for this activity also have obvious differences. The GST and P450 activities of the cucumber population were the lowest in the five host populations. CONCLUSION: Long-term induction of host plants for B-biotype B. tabaci could influence their susceptibilities to several insecticides. Rational selection and usage of insecticides for particular hosts will be helpful for resistance management and control of this species.
|
Displacement of [3H]-methyl-SFX from nAChR in Myzus persicae (green peach aphid) 4106A membrane at 1 ppm after 70 min
|
Myzus persicae
|
30.0
%
|
|
Journal : Pest Manag Sci
Title : Investigating the mode of action of sulfoxaflor: a fourth-generation neonicotinoid.
Year : 2013
Volume : 69
Issue : 5
First Page : 607
Last Page : 619
Authors : Cutler P, Slater R, Edmunds AJ, Maienfisch P, Hall RG, Earley FG, Pitterna T, Pal S, Paul VL, Goodchild J, Blacker M, Hagmann L, Crossthwaite AJ.
Abstract : The precise mode of action of sulfoxaflor, a new nicotinic acetylcholine receptor-modulating insecticide, is unclear. A detailed understanding of the mode of action, especially in relation to the neonicotinoids, is essential for recommending effective pest management practices.Radiolabel binding experiments using a tritiated analogue of sulfoxaflor ([(3) H]-methyl-SFX) performed on membranes from Myzus persicae demonstrate that sulfoxaflor interacts specifically with the high-affinity imidacloprid binding site present in a subpopulation of the total nAChR pool. In competition studies, imidacloprid-like neonicotinoids displace [(3) H]-methyl-SFX at pM concentrations. The effects of sulfoxaflor on the exposed aphid nervous system in situ are analogous to those of imidacloprid and nitenpyram, and finally the high-affinity sulfoxaflor binding site is absent in a Myzus persicae strain (clone FRC) possessing a single amino acid point mutation (R81T) in the β-nAChR, a region critical for neonicotinoid interaction.The nicotinic acetylcholine receptor pharmacological profile of sulfoxaflor in aphids is consistent with that of imidacloprid. Additionally, the insecticidal activity of sulfoxaflor and the current commercialised neonicotinoids is affected by the point mutation in FRC Myzus persicae. Therefore, it is suggested that sulfoxalfor be considered a neonicotinoid, and that this be taken into account when recommending insecticide rotation partnering for effective resistance management programmes.
|
Selectivity ratio of IC50 for recombinant human GABA receptor to IC50 for housefly GABA receptor
|
None
|
1090.0
|
|
Journal : J Pesticide Sci
Title : Insecticide interactions with -aminobutyric acid and nicotinic receptors: predictive aspects of structural models
Year : 2008
Volume : 33
Issue : 1
First Page : 4
Last Page : 8
Authors : Casida JE, Tomizawa M
|
Insecticidal activity against topically-treated Musca domestica (house fly)
|
Musca domestica
|
0.25
mg.kg-1
|
|
Journal : J Pesticide Sci
Title : Insecticide interactions with -aminobutyric acid and nicotinic receptors: predictive aspects of structural models
Year : 2008
Volume : 33
Issue : 1
First Page : 4
Last Page : 8
Authors : Casida JE, Tomizawa M
|
Toxicity in ip dosed Mus musculus (mouse)
|
Mus musculus
|
32.0
mg.kg-1
|
|
Journal : J Pesticide Sci
Title : Insecticide interactions with -aminobutyric acid and nicotinic receptors: predictive aspects of structural models
Year : 2008
Volume : 33
Issue : 1
First Page : 4
Last Page : 8
Authors : Casida JE, Tomizawa M
|
Inhibition of recombinant Homo sapiens (human) GABA receptor
|
Homo sapiens
|
2500.0
nM
|
|
Journal : J Pesticide Sci
Title : Insecticide interactions with -aminobutyric acid and nicotinic receptors: predictive aspects of structural models
Year : 2008
Volume : 33
Issue : 1
First Page : 4
Last Page : 8
Authors : Casida JE, Tomizawa M
|
Displacement of [3H]EBOB from recombinant Homo sapiens (human) GABA rho1 receptor
|
Homo sapiens
|
10000.0
nM
|
|
Journal : J Pesticide Sci
Title : Insecticide interactions with -aminobutyric acid and nicotinic receptors: predictive aspects of structural models
Year : 2008
Volume : 33
Issue : 1
First Page : 4
Last Page : 8
Authors : Casida JE, Tomizawa M
|
Displacement of [3H]EBOB from recombinant Homo sapiens (human) GABA alpha1beta1 receptor
|
Homo sapiens
|
7700.0
nM
|
|
Journal : J Pesticide Sci
Title : Insecticide interactions with -aminobutyric acid and nicotinic receptors: predictive aspects of structural models
Year : 2008
Volume : 33
Issue : 1
First Page : 4
Last Page : 8
Authors : Casida JE, Tomizawa M
|
Displacement of [3H]EBOB from recombinant Homo sapiens (human) GABA alpha1beta1gamma2 receptor
|
Homo sapiens
|
2800.0
nM
|
|
Journal : J Pesticide Sci
Title : Insecticide interactions with -aminobutyric acid and nicotinic receptors: predictive aspects of structural models
Year : 2008
Volume : 33
Issue : 1
First Page : 4
Last Page : 8
Authors : Casida JE, Tomizawa M
|
Displacement of [3H]EBOB from recombinant Homo sapiens (human) GABA alpha1beta3gamma2 receptor
|
Homo sapiens
|
33.0
nM
|
|
Journal : J Pesticide Sci
Title : Insecticide interactions with -aminobutyric acid and nicotinic receptors: predictive aspects of structural models
Year : 2008
Volume : 33
Issue : 1
First Page : 4
Last Page : 8
Authors : Casida JE, Tomizawa M
|
Displacement of [3H]EBOB from recombinant Homo sapiens (human) GABA alpha1beta3 receptor
|
Homo sapiens
|
28.0
nM
|
|
Journal : J Pesticide Sci
Title : Insecticide interactions with -aminobutyric acid and nicotinic receptors: predictive aspects of structural models
Year : 2008
Volume : 33
Issue : 1
First Page : 4
Last Page : 8
Authors : Casida JE, Tomizawa M
|
Displacement of [3H]EBOB from recombinant Homo sapiens (human) GABA alpha6beta3gamma2 receptor
|
Homo sapiens
|
17.0
nM
|
|
Journal : J Pesticide Sci
Title : Insecticide interactions with -aminobutyric acid and nicotinic receptors: predictive aspects of structural models
Year : 2008
Volume : 33
Issue : 1
First Page : 4
Last Page : 8
Authors : Casida JE, Tomizawa M
|
Displacement of [3H]EBOB from recombinant Homo sapiens (human) GABA alpha6beta3 receptor
|
Homo sapiens
|
3.1
nM
|
|
Journal : J Pesticide Sci
Title : Insecticide interactions with -aminobutyric acid and nicotinic receptors: predictive aspects of structural models
Year : 2008
Volume : 33
Issue : 1
First Page : 4
Last Page : 8
Authors : Casida JE, Tomizawa M
|
Displacement of [3H]EBOB from recombinant Homo sapiens (human) GABA beta3 receptor
|
Homo sapiens
|
2.4
nM
|
|
Journal : J Pesticide Sci
Title : Insecticide interactions with -aminobutyric acid and nicotinic receptors: predictive aspects of structural models
Year : 2008
Volume : 33
Issue : 1
First Page : 4
Last Page : 8
Authors : Casida JE, Tomizawa M
|
Inhibition of Musca domestica (house fly) GABA receptor
|
Musca domestica
|
2.3
nM
|
|
Journal : J Pesticide Sci
Title : Insecticide interactions with -aminobutyric acid and nicotinic receptors: predictive aspects of structural models
Year : 2008
Volume : 33
Issue : 1
First Page : 4
Last Page : 8
Authors : Casida JE, Tomizawa M
|
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
|
1.08
|
|
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
|
4.45
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
|
4.11
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.
|
Termiticidal activity against Reticulitermes flavipes assessed as mortality after 4 days by forced exposure test
|
Reticulitermes flavipes
|
0.49
ug/g
|
|
Journal : Pest Manag Sci
Year : 2012
Volume : 68
Issue : 1
First Page : 123
Last Page : 126
|
Termiticidal activity against Reticulitermes flavipes assessed as mortality at 0.06 ug/g after 7 days by forced exposure test
|
Reticulitermes flavipes
|
100.0
%
|
|
Journal : Pest Manag Sci
Year : 2012
Volume : 68
Issue : 1
First Page : 123
Last Page : 126
|
Termiticidal activity against Reticulitermes flavipes assessed as mortality at 0.6 ug/g after 3 days by forced exposure test
|
Reticulitermes flavipes
|
100.0
%
|
|
Journal : Pest Manag Sci
Year : 2012
Volume : 68
Issue : 1
First Page : 123
Last Page : 126
