Compatibility and Efficacy of Insecticides and Fungicides for Integrated Pest and Disease Management in Urdbean (Vigna mungo)

Abstract

The productivity of urdbean (Vigna mungo L. Hepper) in India faces significant challenges from insect pests and diseases, resulting in substantial yield losses. This study evaluated the efficacy and compatibility of novel insecticides like thiamethoxam and spinosad and a fungicide, propiconazole for the integrated management of sucking pests (aphids, whiteflies) and diseases (Yellow Mosaic Virus, Cercospora Leaf Spot) in urdbean under kharif upland conditions. Field research trials demonstrated that combined applications significantly reduced pest populations and disease severity without causing phytotoxicity, leading to higher yields. Thiamethoxam 25 WG + propiconazole 25 EC recorded the highest pest reduction (up to 82.7% for aphids, 75% for whiteflies) and disease control (72.4% for CLS), resulting in a yield increase of 87.8% overcontrol. The treatment including thiamethoxam 25 WG + propiconazole 25 EC registered the highest net return of Rs 16,955/- and the highest B:C ratio of 1.79. This cost-effective, compatible tank-mix approach provides a sustainable solution for resource-poor farmers, enhancing urdbean productivity and supporting food security.