Efficacy of Insecticides against Hopper Complex on Langra Mango in Chhattisgarh

Field experiments carried out for two years during 2007 and 2008 on the efficacy of different insecticides viz., organochlorines (endosulfan 0.05%), organophosphates (monocrotophos 0.05%, profenophos 0.05%), carbamates (thiodicarb 0.05%, carbaryl 0.05%), neonicotinoids (imidacloprid 0.005%) and botanicals (azadirachtin 0.05%) against mango hoppers (Amritodus atkinsoni Lethierry and Idioscopus clypealis Lethierry) and their influence on fruit yield with avoidable losses, revealed that the imidacloprid was most effective and significantly superior in reducing the hopper population (97.6%) as well as increasing fruit yield (the highest yield being 79.10 kg tree⁻¹) followed by carbaryl with reduction in hopper population of 88.31% and fruit yield of 67.05 kg tree⁻¹. The respective values for reduction in hopper population in endosulfan, thiodicarb, monocrotophos and profenophos were 87.16, 83.73, 82.54 and 77.35 per cent and those for mango fruit yield being 63.62, 55.70, 52.70 and 49.25 kg tree⁻¹. Azadirachtin was least effective amongst insecticides with 65.21% reduction in hopper population and fruit yield of 43.28 kg tree⁻¹. All the treatments were superior than the untreated check.