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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

Mosquito larvicidal properties of Impatiens balsamina(Balsaminaceae)against Anopheles stephensi,Aedes aegypti and Culex quinquefasciatus(Diptera:Culicidae)

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Journal of Coastal Life Medicine 2014年第3期 222-224页

作者： Marimuthu Govindarajan Mohan Rajeswary Unit of Vector Biology and Phytochemistry Department of ZoologyAnnamalai UniversityAnnamalainagarIndia

Objective:To assess the larvicidal potential of the crude benzene,chloroform,ethyl acetate and methanol solvent extracts of the medicinal plant Impatiens balsamina against Anopheles stephensi(***),Aedes aegypti(***)and Culex quinquefasciatus(***).Methods:Twenty five third instar larvae of ***,*** and *** were exposed to various concentrations and were assayed in the laboratory by using the protocol recommended by *** larval mortality was observed after 24 h of ***:Among extracts tested,the highest larvicidal activity was observed in leaf methanol extract of Impatiens balsamina against ***,*** and *** with the LC_(50)and LC_(90)values 98.04,119.68,125.06 and 172.93,210.14,220.60 mg/L,***:From the results it can be concluded that the larvicidal effect of Impatiens balsamina against ***,*** and *** make this plant product promising as an alternative to synthetic insecticide in mosquito control programs.

关键词： Impatiens balsamina larvicidal activity Anopheles stephensi Aedes aegypti Culex quinquefasciatus

Chemical composition and laboratory investigation of Melissa officinalis essential oil against human malarial vector mosquito,Anopheles stephensi L.(Diptera:Culicidae)

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Journal of Coastal Life Medicine 2016年第12期4卷 969-973页

作者： Mathalaimuthu Baranitharan Shanmugam Dhansekaran Kadarkarai Murugan Kalimuthu Kovendan Jayapal Gokulakrishnan Division of Phytochemistry and Entomotoxicity Department of ZoologyAnnamalai UniversityAnnamalai Nagar 608002Tamil NaduIndia PG and Research Department of Zoology Thiru Kolanjiappar Government Arts CollegeVirudhachalam 606001Tamil NaduIndia Division of Entomology Department of ZoologySchool of Life SciencesBharathiar UniversityCoimbatore 641046Tamil NaduIndia Department of Zoology Poompuhar College(Autonomous)Melaiyur 609107Tamil NaduIndia

Objective:To decide the larvicides,ovicidal,pupicidal and repellent activity of Melissa officinalis(***)chemical compositions against important mosquito Anopheles stephensi(***)(Diptera:Culicidae).Methods:A chemical constituent of 24 compounds was identified in the oils of *** compounds representing to 98.73%.A total of 253rd instar larvae of *** were showed to a variety of concentrations(30-300 mg/L)in laboratory by means of utilizing the standard procedure portrayed by World Health Organization(2005).The larvae were exposed for 24 h and mortalities were subjected to probit *** ovicidal activity was strong-minded against *** mosquito to a variety of concentrations ranging from 15-90 mg/L under the laboratory *** repellent activity of *** chemical compositions tested at concentrations of 0.75 and 1.50 mg/cm^(2)was evaluated in a net cage(45 cm×45 cm×40 cm)including 100 blood starving female mosquitoes of *** using the methods of World Health Organization(1996).Results:The LC_(50)and LC_(90)values of citronellal compound against *** larvae were 85.44 and 159.73 mg/L,*** percent hatchability of the ovicidal action was observed 48 h ***,the citronellal compound and other compositions were found to be mainly effective against eggs of *** compound exerted 45,60,75 and 90 mg/L against ***,*** repellent activity of citronellal compound was contained to be mainly effective and the maximum action was observed at 0.75 and 1.50 mg/cm^(2)concentrations giving 100%protection up to 210 min against ***:This current study was undertaken to evaluate the larvicidal,ovicidal,repellent potential of compounds from the *** essential oil against *** is initial statement on the mosquito larvicidal,ovicidal and repellent activity of *** chemical compositions.

关键词： Melissa ofifcinalis Anopheles stephensi larvicidal activity Ovicidal activity Repellent activity

Mosquito larvicidal and ovicidal properties of Pithecellobium dulce(Roxb.)Benth.(Fabaceae)against Culex quinquefasciatus Say(Diptera:Culicidae)

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Journal of Coastal Life Medicine 2014年第4期 308-312页

作者： Govindarajan Marimuthu Rajeswary Mohan Division of Vector Biology and Phytochemistry Department of ZoologyAnnamalai UniversityAnnamalainagar-608002TamilnaduIndia

Objective:To assess the larvicidal and ovicidal potential of the crude hexane,benzene,chloroform,ethyl acetate and methanol solvent extracts from the medicinal plant,Pithecellobium dulce(***)against filariasis vector mosquito,Culex quinquefasciatus(***).Methods:Twenty five early third instar larvae of *** were exposed to various concentrations and were assayed in the laboratory by using the protocol of W HO(2005).The larval mortality was observed after 24 h of *** ovicidal activity was determined against *** mosquito eggs to various concentrations ranging from 100-750 mg/L under the laboratory ***:The methanol extract of the leaves and seed of *** was the most effective against the larvae with LCs0 and LCgo values 164.12 mg/L,214.29 mg/L,289.34 mg/L and 410.18 mg/L being observed after 24 h of *** efficacy of methanol was followed by that of the ethyl acetate,chloroform,benzene and hexane *** mean percent hatchability of the egg rafts were observed after 48 h of *** 100%mortality was observed at 500 mg/L for leaf and 750 mg/L for seed methanol extracts of ***:From the results,it can be concluded that the larvicidal and ovicidal effect of *** against *** make this plant product promising as an alternative to synthetic insecticide in mosquito control programs.

关键词： Culex quinquefasciatus Pithecellobium dulce larvicidal activity Ovicidal activity Leaf and seed