Bio-efficacy of some insecticides against mustard aphid, Lipaphis erysimi (Kalt.) (Hemiptera: Aphididae)

Abstract

Laboratory bioassay of eight insecticides namely Chlorpyriphos 20 EC, Ethiprole+ imidacloprid 80 WG, Pymetrozine 50 WP, Lamda cyhalothrin 4.9 CS, Imidacloprid 30.5 SC, Acephate 95 SG, Thiacloprid 240 SC and Fipronil 5 SC was conducted in the Regional Research and Technology Transfer Station (OUAT), Chiplima, Odisha against mustard aphid, Lipaphis erysimi (Kalt.) using leaf dip method in Feb-March, 2016. Among insecticides, chlorpyriphos 20 EC was the most toxic (LD50 5.38 ppm) followed by imidacloprid 30.5 SC (LD50 22.14 ppm), ethiprole+ imidacloprid 80 WG (LD50 22.94 ppm), thiacloprid 240 SC (LD50 27.17 ppm), pymetrozine 50 WP (LD50 25.59 ppm), Lamda cyhalothrin 4.9 CS (LD50 31.34 ppm), acephate 95 SG (LD50 111.22 ppm), fipronil 5 SC (LD50 234.15 ppm).