Toxicity of some commonly used insecticides against coccinella undecimpunctata (Coleoptera: Coccinellidae)

Coccinella undecimpunctata is one of the most common indigenous predators of sucking insect pests such as aphids,mealybugs,whiteflies on different crops like cotton,sunflower,fruit plants and vegetables. effect of some commonly used insecticides like imidacloprid,acetamiprid,cypermethrin,deltamethrin and profenofos were tested for their residual effects using glass vial method and treated leaves for the residual effects of insecticides. mortality of adult c. undecimpunctata at 24,48 and 72 hours ranging from 50-91% and 10-78 % was observed in glass vial and treated leaves methods,respectively. profenofos was the most toxic insecticide in both methods whereas imidacloprid caused the lowest mortality. field sprayed leaves exposure proved imidacloprid the least toxic insecticide. in residual film method,acetamiprid was the least toxic but most toxic in glass vial method. © 2011 zoological society of pakistan.