Pigeonpea Pod Bug

📖 Description

Pigeonpea Pod Bug (Clavigralla gibbosa) is an important pod-sucking pest of pulses across the Indian subcontinent, particularly severe in pigeonpea belts of Maharashtra, Karnataka, Andhra Pradesh, Telangana, Gujarat and Madhya Pradesh where pigeonpea is grown on over 4 million hectares. The pest attacks pods at all stages of development — both nymphs and adults pierce pod walls and feed on developing grains, causing shrivelled and deformed pods, brown staining on grains (‘bug damage’), and reduced grain weight and quality. The brown staining is particularly damaging because it downgrades grain quality and marketability, even when yield loss is modest. Outbreaks are favoured by warm dry weather during pod formation and continuous pulse cropping. The pest is most active during the post-monsoon pod formation period (October-January). IPM with neem-based sprays at pod formation, conservation of egg parasitoids (Trissolcus, Gryon), and need-based insecticide use provides effective control. The pest is particularly difficult to control because (a) it feeds directly on pods where contact insecticides don’t reach well, (b) it has a relatively long life cycle (45-60 days), allowing multiple overlapping generations during the pod formation period, and (c) it has developed resistance to many insecticides. Early-maturing varieties that escape peak bug pressure are an important preventive measure.