Evaluation of IPM modules for the control of white grub in groundnut

Abstract

The study was conducted to develop effective integrated pest management (IPM) strategies against white grub in groundnut under Kolhapur conditions during 2024-2025. Seven IPM modules combining chemical, biological, cultural, and mechanical approaches were evaluated. Among these, Module 5 (soil drenching with fipronil + imidacloprid at sowing, followed by Metarhizium anisopliae application at pegging and pod formation) proved most effective, recording the lowest plant mortality and grub density, while achieving maximum pod (2173 kg/ha) and fodder yield (3214 kg/ha). It also ensured the highest profitability with a benefit-cost ratio of 2.03. Module 4 (clothianidin + M. anisopliae + Heterorhabditis indica) performed statistically on par with Module 5, whereas Module 2, though less effective, gave the highest incremental cost-benefit ratio due to reduced input costs. The results confirm that integration of chemical seed/soil treatments with entomopathogenic fungi and nematodes enhances both effectiveness and sustainability of white grub management. Such modules reduce pest pressure, improve crop productivity, and ensure economic viability. The findings advocate the adoption of IPM-based modules, particularly Module 5, as a reliable, eco-friendly, and farmer-oriented solution for managing H. serrata in groundnut ecosystems.