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Bioefficacy of Caesalpinia bonducella extracts against tobacco cutworm,Helicoverpa armigera(Hub.)(Lepidoptera:Noctuidae)

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Journal of Coastal Life Medicine 2015年第5期 382-388页

作者： backiyaraj muthusamy Elumalai Arumugam Kasinathan Dhamodaran Mathivanan Thangarasu Krishnappa Kaliyamoorthy Elumalai Kuppusamy Unit of Entomotoxicity Department of Advanced Zoology and BiotechnologyGovt.Arts College(Autonomous)NandanamChennai-600035TamilnaduIndia

Objective:To evaluate the antifeedant,oviposition deterrent,ovicidal and larvicidal activities of benzene,dichloromethane,diethylether,ethyl acetate and methanol extracts of Indian medicinal plant,Caesalpinia bonducella(***)at different concentrations against Lepidopteran agricultural field pest Helicoverpa armigera(Lepidoptera:Noctuidae).Methods:Antifeedant activities of the selected plant extract were studied using leaf disc no-choice method and oviposition deterrent,ovicidal and larvicidal activities were also assessed by adapting the standard ***:The antifeedant activity of *** showed significant antifeedant activity in methanol *** deterrency is higher in methanol extract than the other solvent ***,maximum egg mortality was observed in methanol leaf extract of *** Lethal concentration,LC_(50)value of benzene,diethylether,dichloromethane,ethyl acetate and methanol extract of *** were 470.02,469.00,465.47,460.52 and 443.87 mg/L *** Chi-square values are significant at P<0.05 *** five solventextracts,the methanol extract was responsible for strong lethal activity observed against selected pest ***:Results of this study show that the selected Indian medicinal plant *** could be a potent source of natural antifeedant,oviposition deterrent,ovicidal and larvicidal agent against the field pest Helicoverpa armigera.

关键词： Helicoverpa armigera Caesalpinia bonducella Antifeedant activity Oviposition deterrent activity Ovicidal activity Larvicidal activity

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Pesticidal activity of Rivina humilis L.(Phytolaccaceae)against important agricultural polyphagous field pest,Spodoptera litura(Fab.)(Lepidoptera:Noctuidae)

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Journal of Coastal Life Medicine 2015年第5期 389-394页

作者： Elumalai Arumugam backiyaraj muthusamy Kasinathan Dhamodaran Mathivanan Thangarasu Krishnappa Kaliyamoorthy Elumalai Kuppusamy Unit of Entomotoxicity Department of Advanced Zoology&BiotechnologyGovt.Arts College AutonomousNandanamChennai-600035TamilnaduIndia

Objective:To evaluate the pesticidal activity of antifeedant,oviposition deterrent,ovicidal and larvicidal activities of benzene,dichloromethane,diethylether,ethylacetate and methanol extracts of Rivina humilis at different concentrations against agricultural polyphagous pest Spodoptera litura(Lepidoptera:Noctuidae)(***).Methods:Antifeedant activities of the selected plant extract were studied as described by Isman et al.(1990),with slight *** oviposition deterrent activity,ten pairs of(adult moths)*** were subjected in five *** 48 h,the numbers of eggs masses laid on treated and control leaves were recorded and the percentage of oviposition deterrence was *** ovicidal activity was determined against the eggs of *** five early fourth instar larvae of *** were exposed to various concentrations and was assayed by using the protocol of Abbott’s formula(1925);the 24 h LC_(50)values of the Rivina humilis leaf extract was determined by probit ***:All the extracts showed moderate antifeedant activitiy;however,significant antifeedant,ovicidal,oviposition deterrent and larvicidal activities were observed in methanol ***:This study showed that the selected plant can be a potent source of natural antifeedant,oviposition deterrent,ovicidal and larvicidal activities against field pest ***.

关键词： Spodoptera litura Rivina humilis Antifeedant activity Oviposition deterrent activity Ovicidal activity Larvicidal activity

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