Toxicity of Certain Insecticides to Predatory Green Lacewing, Chrysoperla carnea Stephens (Nenroptera: Chrysopidae)

Insecticides showed distinct deleterious effects on different life stages of predatory green lacewing, Chrysoperla carnea Stephens. Abamectin caused the maximum egg mortality of 25.2 per cent as against 0.3 per cent in control. Carbaryl affected the grubs more and the mortality was 83.3 per cent. Endosulfan and ahamectin had no adverse influence on the grubs and the grub mortality was only 3.3 and 6.7 per cent. respectively. Adult emergence was highly affected by carharyl, which recorded only 10.00 per cent as against 93.33 per cent adult emergence in control. The time taken for cent per cent mortality of adults in control was 23.33 days, but in the case of quinalphos (0.04%), it was 0.66 days and the fecundity was 0.5 eggs as against 160.4 eggs in control.