Mortality of Chrysoperla carnea (Stephens) (Neuroptera: Chrysopidae) after exposure to some insecticides; laboratory studies

Eight Insecticides viz.diafenthmron, buprofezm, thiodicarb, lmidacloprid, carbosulfanmethamidophos, acetamipnd, thiamethoxam were tested for their toxicity against predator Chrysoperla carnea (Stephens) through leaf dip bioassay method under laboratory conditions.Insecticides were applied at three levels of concentration i.e., low (Cl), recommended (C2), high (C3) in a completely randomized manner.Low (Cl ) and recommended (C2) concentrations of diafenthiuron and buprofezin were found harmless while high concentration of both insecticides was found slightly harmful after 24 hours exposure.Thiodicarb was harmless at lower concentration (Cl) but slightly harmful at recommended (C2) and higher (C3) concentrations.Acetamiprid and thiamethoxam were moderately harmful at lower concentration (C l ) whereas were toxic at recommended and higher concentrations.All insecticides, at all concentrations were found toxic after 48 hours except buprofezm and thiodicarb.Pupation rates were lowest (0.00 %) in the acetamiprid and highest (71.7 %) in the buprofezin treatment Key words: Chrysoperla carnea, leaf dip bioassay, mortality, selective insecticides