Occurrence and distribution of black scurf of potato in different districts of Madhya Pradesh

Abstract

Rhizoctonia solani Kuhn (Teleomorph: Thanatephorus cucumeris Frank Donk) causing black scurf and stem canker on potato crop is a economically important diseases. The Rhizoctonia disease complex is common and occurs in potato production areas throughout the world. A survey was conducted during Rabi 2015-16 and 2016-17 in the farmer's field of the five districts of Madhya Pradesh viz., Gwalior, Bhind Morena, Shivpuri and Datia to find out the incidence and severity of black scurf of potato. Surveyed results indicated the prevalence of disease at all the surveyed area. Maximum disease incidence and severity was recorded at Sheopur district (25.23 and 13.84% respectively), while minimum disease incidence (45%) was observed at Bhind district (13.81 and 8.17% respectively). At individual localities, the highest mean disease incidence and severity of 36.82 and 18.53 per cent respectively was found at Ajapura, while the minimum disease incidence and severity of 9.28 and 6.24 per cent respectively was found at Sonpura.