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1.
Indian J Exp Biol ; 2012 June; 50(6): 439-442
Artigo em Inglês | IMSEAR | ID: sea-145272

RESUMO

Five insecticides (Bifenthrin, Deltamethrin, Etofenprox, Permethrin and Lamda cyhalothrin) recommended by WHO, at their recommended dose were compared for their efficacy and wash resistance through bioassay against mosquito vectors, Culex quinquefasciatus, Aedes aegypti and Anopheles stephensi. Etofenprox treated nettings exhibited better knockdown and mortality than the other insecticides. The order of efficacy of the insecticides treated nettings was Etofenprox ≥ Deltamethrin > Lambda cyhalothrin > Permethrin > Bifenthrin.

2.
J Environ Biol ; 2008 Jan; 29(1): 43-5
Artigo em Inglês | IMSEAR | ID: sea-113276

RESUMO

Larvicidal effect of neem (Azadirachta indica) and karanja (Pongamia glabra) oil cakes (individuals and combination) was studied against mosquito species. Both the oil cakes showed larvicidal activity against the mosquito species tested. The combination of neem and karanja oil cakes in equal proportion proved to have better effect than the individual treatments. The combination of the two oil cakes recorded an LC95 of 0.93, 0.54 and 0.77% against the mosquitoes, Culex quinquefasciatus, Aedes aegypti and Anopheles stephensi respectively The increase in efficacy of the combination treatment over individuals in all the mosquito larvae tested was found to range about 4 to 10 fold in terms of LC50 and 2 to 6 fold in terms of LC95.


Assuntos
Aedes , Animais , Anopheles , Azadirachta/química , Culex , Culicidae/efeitos dos fármacos , Inseticidas/farmacologia , Larva/efeitos dos fármacos , Controle de Mosquitos/métodos , Óleos Voláteis/farmacologia , Pongamia/química , Especificidade da Espécie , Fatores de Tempo
3.
J Environ Biol ; 2004 Oct; 25(4): 419-21
Artigo em Inglês | IMSEAR | ID: sea-113905

RESUMO

A laboratory investigation was undertaken to study the cyclic usage of field recommended doses of Bacillus thuringiensis israelensis (Bti), Bacillus sphaericus (Bsp) and combination of Bti and Bsp (half the recommended dose of each) with deltamethrin 2.8 EC to attain better control of mosquito larvae. To understand the susceptibility status of the Culex quinquefasciatus larvae in the field, early fourth instar field collected larvae were exposed to the above treatments of biopesticides and were monitored for their persistency till 50% mortality was obtained. The larvae those survived in each treatment were transferred to the concentration of deltamethrin that gave 50% mortality. Observations on larval mortality after the treatment with deltamethrin were recorded after 24 h. The results revealed that Bti excels Bsp, as it recorded 54% mortality only on 17th day after application. The other salient finding of this study is LC50 of deltamethrin is sufficient to follow the biopesticides application for an effective control of Culex larvae.


Assuntos
Animais , Bacillus/patogenicidade , Culex/efeitos dos fármacos , Relação Dose-Resposta a Droga , Índia , Controle de Insetos/métodos , Insetos Vetores/efeitos dos fármacos , Inseticidas/toxicidade , Larva/efeitos dos fármacos , Dose Letal Mediana , Nitrilas/toxicidade , Piretrinas/toxicidade , Fatores de Tempo , Wuchereria bancrofti
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