A. Balamurugan, M.Sc (Agri)Department of Plant Pathology, Agricultural College and Research Institute (TNAU)Madurai, Tamil Nadu, IndiaEmail: abalamurugan555@gmail.com
Host: Vigna mungo (L.) Hepper (black gram)Disease name: Mungbean yellow mosaicPathogen name: Mungbean yellow mosaic virus (MYMV) (genus: Begomovirus, family: Geminiviridae)
Mungbean yellow mosaic is the most destructive disease of kharif legumes (black gram) in India. It was first reported in 1960 and now occurs throughout the country. The infected plants show alternating green and yellow patches. Leaf size is generally not affected, but sometimes the green areas are slightly raised and the leaves show a slight puckering and reduction in size. The leaves become papery white and thin. The disease is transmitted by the whitefly vector Bemisia tabaci.
Management strategies: Infected plants should be removed. A barrier crop, such as sorghum, maize, or cumbu, can be grown. Insecticides can be sprayed to control the whitefly vector. Resistant varieties, Vamban 1 and 2, are available.
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