Urdbean (Vigna mungo (L.) Hepper) is an important pulse crop grown in all pulse growing districts of Tamil Nadu. The productivity of urdbean is very low mainly due to yield losses caused by various viral diseases. Urdbean Leaf Crinkle Disease (ULCD) is one of the important viral diseases that affect both the quality and quantity of the seed. An intensive roving survey was conducted during cropping seasons of 2018-2019 in major blackgram growing districts of Tamil Nadu viz., Coimbatore, Villupuram, Cuddalore, Tenkasi, Tirunelveli and Pudukottai to determine disease incidence and insect diversity. The farmers were cultivating blackgram varieties were CO-6, VBN-4, VBN-5, VBN-6, VBN-8, KKM-1, MDU-5 and T-9. All the cultivars were found to be susceptible to ULCD ranging from 11.80 to 33.50%. Higher level of disease incidence (33.50%) was observed in T-9 variety in Pudukottai district followed by VBN-8 variety (30.66%) in Coimbatore district. The lowest level of disease incidence was recorded in VBN-5 (11.80%) and CO-6 (12.8%) in Tenkasi and Coimbatore district respectively. The most prevalence insects visiting the urdbean field were Whitefly, Aphid, Hoppers and Coccinelid beetles.

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