Abstract
This study was designed to evaluate the toxicity of three insecticides: viz. cypermethrin, azadirachtin and bifenthrin against two important crop infest aphid species Lipaphis erysimi (Katenbach) and Myzus persicae (Sulzer), reared on cauliflower and potato plants respectively. By brining leaves with tested aphid population of the vegetable plants,
residual film technique (RFT) was applied. Cypermethrin was found to be most toxic with LC50 as 14.30 µg cm-2 for L.erysimi and 14.12 µg cm-2 for M. persicae. Bifenthrin showed moderate toxic with LC50 as 28.55 µg cm-2 for L. erysimi and 29.22 µg cm-2 for M. persicae. Among insecticides, azadirachtin showed highest toxicity with LC50 as 0.33 µg cm2 for L. erysimi and 0.31 µg cm-2 for M. persicae
Muhammad Zafar, Muhammad Khalil Ahmad Khan and Asmatullah. (2015) Efficacy of cypermethrin, bifenthrin and azadirechtin against crop infesting aphid species of Lipaphis erysimi (katenbach) and Mhyzus persicae (sulzer) on cauliflower and potato plants, Punjab University Journal of Zoology, Volume 30, Issue 1.
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