Yellow mosaic virus is the most prevalent and destructive viral pathogen in black gram which resulted in decrease in area of blackgram cultivation. It causes yield loss up to 70-80 per cent and also reduces the seed quality. Therefore, suitable blackgram varieties with Yellow mosaic virus (YMV) resistance suitable for Tiruvallur district is need to be assessed. Hence on farm assessment for blackgram varieties resistance to YMV study was carried out in Tiruvallur district during 2022-2023. The results revealed that lower disease incidence of 5.5 per cent was recorded in VBN 11 which was superior to other varieties followed by 11.5 per cent in TBG 104 and highest of 25.50 per cent disease incidence was recorded in farmers practicing variety T 9. Variety VBN 11 recorded higher yield of 8.30 q/ha with higher net return of Rs. 32,125/ha and benefit-cost ratio of 2.49. Hence VBN 11 would be a better variety resistance for YMV and for enhancing the productivity of black gram in Tiruvallur district, Tamil Nadu.
Assessment, Yellow Mosaic virus, Black Gram, Resistant varieties, Tiruvallur
