Prevalence of mungbean yellow mosaic virus on greengram in northern parts of Karnataka

Abstract

Globally, mungbean yellow mosaic disease acting as a major constraint of greengram production. Its incidence isalso gradually increasing in northern parts Karnataka. Mungbean yellow mosaic disease has peculiar symptoms likeinitially yellow-coloured spots scattered on young leaves followed by yellow mosaic pattern and puckering and slowdrying of yellow leaves and wither. Infected plants bear few flowers and pods with some immature and deformed seeds.Pods of the infected plants were reduced in size and turned yellow in colour. Roving survey was conducted for two seasons,viz., kharif 2021 and summer 2021-22 to know per cent disease incidence in Bagalkot, Belagavi, Dharwad, and Gadagdistricts of northern parts of Karnataka. Among the four districts, average maximum incidence of 16.85 per cent wasrecorded in Gadag followed by Dharwad (15.01%), whereas the lowest incidence of 11.58 per cent was noticed in Bagalkotdistrict during kharif. Maximum incidence of 30.10 per cent was recorded in Dharwad followed by Belagavi (25.02%),whereas the lowest incidence of 20.59 per cent was noticed in Bagalkot district during summer.