Evaluating Bagging as a Non-Chemical Screening Method to Manage Grasshoppers in Cowpea (Vigna unguiculata L. Walp)

This study evaluated the effectiveness of bagging as a physical exclusion technique for managing grasshopper infestation in cowpea (Vigna unguiculata L. Walp), in comparison with chemical and botanical treatments. Five management strategies were assessed: chemical control (Malathion 50 EC), traditional practices, azadirachtin application, physical bagging, and an untreated control. Percent damage was recorded at 2, 5, 7, 10, and 14 days after transplanting (DAT). Among all treatments, the physical bagging method consistently maintained zero damage throughout the 14-day observation period, demonstrating significantly superior efficacy. Chemical and traditional methods showed moderate initial effectiveness but declined over time, while azadirachtin was the least effective. These findings highlight bagging as a promising, eco-friendly alternative to chemical control, particularly suited for smallholder farmers seeking sustainable and affordable pest management solutions. Key words Bagging, grass hopper, cowpea, management