Bioefficacy of newer insecticides against hopper complex on 'Alphonso' mango in humid tropics of South Gujarat.
Sushil Kumar, Raghvani B. R., Bhatt R. I.
Author Affiliation: Agric. Exptl. Station, Navsari Agric. Univ., Paria (Pardi), Valsad - 396 145, Gujarat, India.
Journal of Applied Zoological Researches 16 : 64-66
Abstract : Four newer insecticides, imidacloprid (Confidor 200 SL, 0.005%), thiamethoxam (Actara 25 WG; 0.0084%), profenophos (Curacron 50 EC; 0.1%) and ?-cyhalothrin (Karate 5 EC; 0.003%), along with ready mix insecticides, i.e. profenophos+cypermethrin (Polytrin-C 44 EC; 0.044%), and chlorpyriphos+cypermethrin (Nurelle-D 55 EC; 0.05%), and eight conventional insecticides, i.e. monocrotophos (0.05%), endosulfan (0.07%), chlorpyriphos [chlorpyrifos] (0.05%), cypermethrin (0.003%), methomyl (0.15%), acephate (0.15%), carbosulfan (0.05%) and BPMC [fenobucarb] (0.05%), were evaluated against hopper complex (Amritodus atkinsoni, Idioscopus clypealis and I. niveosparsus) on mango cv. Alphonso during 1999-2004 in Paria, Gujarat, India. First application was given at panicle emergence, i.e. before flower opening, followed by 2 sprays at 15 days interval. Imidacloprid was the most effective in reducing the hopper population, having the lowest population of 1.20 hoppers per panicle 6 days after spraying, and resulted in the highest yield of 44.30 kg/tree. However, it did not differ significantly from monocrotophos, profenofos+cypermethrin and thiamethoxam. Monocrotophos was the most economical treatment, recording the highest cost:benefit ratio of 1:36.59, followed by thiamethoxam, ?-cyhalothrin and imidacloprid.