Residual Toxicity of Insecticides to Egg Parasitoids of Spodoptera frugiperda (J E Smith) Renuka S Mahajan1,*, Bhamare V K1 Biocontrol laboratory, Department of Agricultural Entomology, College of Agriculture, Latur413512Maharashtra, India *Email: renukamahajan1695@gmail.com (corresponding author): ORCID ID 0000-0002-7946-7302
Online Published on 04 January, 2024. Abstract A laboratory study was carried out to assess the residual toxicity of certain insecticides to egg parasitoids of Spodoptera frugiperda (J E Smith), Trichogramma chilonis Ishii, T. pretiosum Riley (Hymenoptera: Trichogrammatidae), and Telenomus remus Nixon (Hymenoptera: Scelioniadae). The median lethal concentrations were recorded at 24 and 48 hr after exposure period to adults of egg parasitoids to nine insecticides. Among the tested spinetoram was found to be “dangerous”, however, chlorantraniliprole, chlorantraniliprole + lambdacyhalothrin, chlorpyriphos + cypermethrin, indoxacarb, cyantraniliprole, emamectin benzoate, thiamethoxam + lambdacyhalothrin and azadirachtin were found to be “slightly to moderately toxic” to T. chilonis and T. pretiosum. Chlorantraniliprole, emamectin benzoate, indoxacarb and spinetoram were found to be “dangerous”, however, chlorpyriphos + cypermethrin, thiamethoxam + lambdacyhalothrin, chlorantraniliprole + lambdacyhalothrin, cyantraniliprole and azadirachtin were “slightly to moderately toxic” to T. remus. Top Keywords Trichogramma chilonis, T. pretiosum, T. remus, LC50, Insecticides, Residual toxicity, Moderately toxic, Slightly toxic, Dangerous, Egg parasitoids, Invasive pest, Spodoptera frugiperda, Corcyra cephalonica, Risk quotients. Top |