Mango hopper management using selected insecticides

An experiment was conducted during 2022-23 mango cropping season with twelve treatments including an untreated control replicated thrice, in lac research station, BARI, Chapainawabganj. Treatments comprised of chlorpyriphos + cypermethrin 55 EC @ 1 ml/L of water; pryiproxifen + fenpropathrin 20 EC @ 1 ml/L of water; deltamethrin 2.5 EC @ 0.5 ml/L of water; chloropyfios + betacypermethrin 60 EC @ 1 ml/L of water; lambda-cyhalothrin 2.5 EC @ 1 ml/L of water; monomihypo + imidacloprid 80 WG @ 0.5 g/L of water; dinotefuran + pymetrozine 80 WDG @ 0.5 g/L of water; imidacloprid + lambda-cyhalothrin 20 SC @ 0.5 ml/L of water; indoxacarb + emamectin benzoate 25 WDG @ 0.1 g/L of water; cartap + acetamiprid 95 sp @ 1.5 g/L of water; imidacloprid 20 SL @ 0.5 ml/L of water and an untreated control. All insecticidal treatments have found superior over untreated control for the management of mango hopper. Imidacloprid 20 SL was found the best among all other treatnents for the management of mango hopper. The effectiveness of newer insecticides for the management of mango hopper was imidacloprid + lambda-cyhalothrin 20 SC, lambda-cyhalothrin 2.5 EC, monomihypo + imidacloprid 80 WG, dinotefuran + pymetrozine 80 WDG, deltamethrin 2.5 EC, chlorpyriphos + cypermethrin 55 EC, indoxacarb + emamectin benzoate 25 WDG, cartap + acetamiprid 95 SP, chloropyfios + betaCypermethrin 60 EC and cypermethrin 10 EC, respectively. The highest number of fruit retention was recorded in imidacloprid (1.83 fruits 10-1 inflorescences/tree) followed by imidacloprid + lambda-cyhalothrin (1.63 fruits 20-1 inflorescences/tree) and lambda-cyhalothrin (1.55 fruits 20-1 inflorescences/ tree) at mature stage. Gradual increase in number of mango hopper was found in untreated control. Overall results suggested that spraying of imidacloprid 20 SL @ 0.5ml/L of water performed better for controlling mango hopper and economic fruit retention compared to imidacloprid + lambda-cyhalothrin and lambda-cyhalothrin.