Evaluation of insecticides against Apion amplum under laboratory and field conditions

Among the insect pests, Apion amplum has gained major importance on greengram in recent years. Adults feed on the flower buds and also make brownish discoloration on tender pods known as egg laying punctures. Grubs feed on the seeds inside the pods. Evaluation of insecticides revealed that the application of fenvalerate @ 0.5 ml/l was found very effective by recording cent per cent mortality compared to other insecticides after 72 hrs of observation. This insecticide was found superior in reducing mean weevil numbers, pod and seed damage to green gram and recording higher yield over other insecticides evaluated under field conditions.