Vol. 7, Issue 10, Part B (2025)

A survey was conducted during August to November 2024 in Udaipur district of Rajasthan to assess the occurrence and population status of root-knot nematode, Meloidogyne incognita, in black gram (Vigna mungo). A total of 66 soil and root samples were collected from ten localities and processed using Cobb’s sieving and Baermann’s funnel techniques. Observations on number of galls per plant, egg masses per plant, and larval population per 200 cc soil revealed widespread infestation. The overall occurrence of M. incognita was 78.78%, with mean values of 47.16 galls per plant, 33.06 egg masses per plant, and 659.29 juveniles per 200 cc soil. The highest incidence was recorded in Madar and Thoor villages (100%), whereas the lowest was in Madar (40%). Variation in nematode occurrence was attributed to crop variety, soil type, age of crop, and agro-ecological conditions. The study confirms that black gram fields in Udaipur district are severely infested with M. incognita, posing a significant threat to crop productivity, and highlights the need for integrated nematode management strategies.