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Journal of Entomology and Zoology Studies

 

Volume 1, Issue 5

 

Study on Side Effects of Diazinon and Imidaclopride on Cryptolaemus montrouzieri Mulsant (Coleoptera: Coccinellidae) Under Laboratory Conditions in Indirect Method in First and Second Generation (Prey Treated with Insecticide)

Author(s): Saeed Alvandy, Samira Aghabaglou, Shila Goldasteh, Zahra Rafiei Karahroudi

Abstract: The study is based on sub lethal effect of Diazinon and Imidacloprid insecticide density evaluation on biological-reproductive parameters and also population growth of Cryptolaemus montrouzieri Mulsant ladybird under controlled conditions (25±2 °C and 65±5% RH) and only focused in the first 72 hours of their lives which were being fed on prey treated mealybug with LC-25 density. Adult longevity of female insect in first generation treated with Diazinon and Imidaclopride was (in order) 20.21 and 19.45, development times in second generation were 30.15 and 30.39 and adult longevity in second generation was 32.17 and 30.93 days. Gross fecundity rate (first generation) in Diazinon and Imidacloprid treat in order were 60.03 and 60.71, Gross fecundity rate (second generation) 270.71 and 247.14, Gross hatch rate 40.82 and 29.16, Net fecundity rate 162.98 and 98.56 and Net fertility rate 110.35 and 47.31, Mean eggs per day4.61 & 3.03 and mean fertile eggs per day 3.14 & 1.45. Intrinsic rates of natural growth (rm) were 0.9 & 0.07 in Diazinon and Imidacloprid treat.

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