Comparative effects of insecticides on mortality, longevity and fecundity of Chrysoperla spp. (Neuroptera: Chrysopidae)

Abstract

The experiment was conducted to evaluate the toxicity of insecticides viz., chlorantraniliprole 18.5 SC, flubendiamide 20 WG, buprofezin 25 SC, lambda cyhalothrin 9.5 + thiamethoxam 12.6 ZC, lambda cyhalothrin 5 EC, azadirachtin 5 w/w, thiamethoxam 25 WG, thiachloprid 21.7 SC on adults of Chrysoperla spp. The maximum adult mortality, from exposure to till death was observed in lambda cyhalothrin + thiamethoxam (86.66%) whereas, azadirachtin recorded minimum mortality of Chrysopa adult (23.33%). The toxicity of lambda cyhalothrin + thiamethoxam had an adverse effect on male and female longevity and application of azadirachtin have no adverse effect when compared with untreated control. Maximum reduction in fecundity was observed in lambda cyhalothrin + thiamethoxam (190.00 eggs/female and 54.76%). However, minimum percent reduction in fecundity were observed in azadirachtin (380.00 eggs/female and 9.52%).