Toxicity and sublethal effects of insecticides to Chrysoperla zastrowi sillemi (Esben-Peterson)

A laboratory experiment was conducted in the Department of Agricultural Entomology, College of Agriculture, Vijayapur, to evaluate the toxicity and sublethal effects of different insecticides to second instar grub of Chrysoperla zastrowi sillemi (Esben-Petersen) (Neuroptera: Chrysopidea). The results of the experiment indicate that among the twelve treatments tested, irrespective of the interval, the grub mortality increased with dosage of insecticides. Among all insecticides tested, minimum mean mortality was observed at 72 hours after treatment (HAT) in NSKE (13.33%) and neem gold 0.03 EC (21.67%) were less toxic, whereas buprofezin 50 SC (40.00%), emamectin benzoate SG (48.33%) and thiamethoxam 25 WG (48.33%) were moderately toxic insecticides. These insecticides had little effect on longevity of adults, fecundity, hatching, pupal emergence and feeding capacity of C. zastrowi sillemi.