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Influence of Temperature on Knock-down and Mortality to Fenitrothion in the Three Lepidopteran Species of Insects

Published online by Cambridge University Press:  19 September 2011

V. B. Yadwad  and
V. L. Kallapur
V. B. Yadwad
Affiliation:
Department of Studies in Zoology, Karnatak University, Dharwad-580003, India
V. L. Kallapur
Affiliation:
Department of Studies in Zoology, Karnatak University, Dharwad-580003, India
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Abstract

Both sublethal and lethal doses of fenitrothion treatment caused positive temperature toxicity relationship in three lepidopteran fifth instar larvae, Achaea Janata, Mythimna separata and Bombyx mori.

The LD50 value was very low at 30°C compared to 28 and 18°C. In all the three species, the insecticide caused greater rate of regurgitation of body fluid at higher temperature. It is believed that the loss of body fluid causes desiccation and enhances the poisoning effects of fenitrothion.

Résumé

Le traitement du cinquième étape du 5th instar larvae, Achaea lanata, Mythimna separata et Bombyx mori par les doses létales et sous létales du fénitrothion a démontré un resultat positif d'un rapport temperature-toxicité.

La valeur LD50 était plus basse à 38°C que celles à 28 et à 18°C. Dans toutes trois spécies l'insecticide a provoqué un taux elevé de régurgitation du fluid corporel aux temperatures élevés. A partir de cette observation, nous pouvous constater que la perte du fluid corporel pourrait être la cause de la desiccation et elle accroit les effects d'empoissonnement de fénitrothion.

Keywords

Temperaturetoxicitysublethallethalfenitrothioncastor semilooperarmywormsilkworm larvae
Type
Research Article
Information
International Journal of Tropical Insect Science , Volume 9 , Issue 4 , August 1988 , pp. 531 - 534
Copyright
Copyright © ICIPE 1988

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