Department of Plant Pathology, G. B. Pant University of Agriculture and Technology, Pantnagar-263145, India.
The urd bean (Vigna mungo (L.) Hepper) is an important pulse crop of India. It is rich in phosphoric acid. The genus Rhizoctonia was described to accommodate the non sporulating root pathogen R. crocorum. The pathogen was observed on diseased potato tubers and named it as Rhizoctonia solani Kuhn. Genus Rhizoctonia has gained the reputation of being a widespread, destructive and versatile plant pathogen. It was reported that 26–28°C temperatures and 90–100 percent relative humidity (RH) favoured maximum disease development. R. solani Kuhn is a common soil borne pathogen that has many hosts forms sclerotia in/on soil and survives for a long period in the absence of a host either as sclerotia or thick walled brown hyphae in plants debries. The web blight disease severity is recorded by using 1–9 rating scale. Cultural practices, chemical control and biological control are effective methods for management the web blight of urd bean.
