Effect of insecticides on adult emergence from different developmental stages of Trichogramma chilonis (Ishii) (Hymenoptera: Trichogrammatidae) under laboratory condition

Abstract

The present investigation was carried out in the biocontrol laboratory, entomology section, College of Agriculture, Nagpur during 2016-2017 to study the effect of insecticides viz. Chlorantraniliprole 18.5 SC, Diafenthiuron 50 WP, Cartap hydrochloride 50 SP, Spiromesifen 22.9 SC, Thiamethoxam 25 WG, Clothiandin 50 WDG, Flonicamid 50 WG, Azadirachtin 1500 ppm on the rate of adult emergence of T.chilonis, when applied during different developmental stages i.e egg, egg- larval and pupal stages. Amongst all the insecticides understudy, cartap hydrochloride was found most toxic causing the highest reduction in the emergence of adults, when applied after 1st, 3rd and 5th days after parasitization which coincide with the egg, egg- larval and pupal stage of Trichogramma. Whereas, diafenthiuron, was found least toxic upon application during egg and egg larval stage and azadirachtin during the pupal stage.