Survey and Prevalence of Stem Rot of Cluster Bean (Cyamopsis tetragonoloba L.) Incited by Sclerotium rolfsii in Major Growing Districts of Northern M.P., India

Stem rot of cluster bean caused by Sclerotium rolfsii Sacc., is a soil-borne disease that leads to significant crop damage and yield loss. In 2023, a survey was conducted across 100 fields in 20 villages within three districts of northern Madhya Pradesh. The findings revealed that stem rot caused by Sclerotium rolfsii, is a prominent pathological issue with its presence confirmed in all surveyed districts. A roving survey was carried out in Gwalior, Morena and Shivpuri districts to evaluate the severity of the disease. Average disease incidence of stem rot varied from 1.33 % to 25.33 % on all the cultivars grown by the farmers. In Gwalior district, the highest incidence of stem rot (25.33%) was recorded in Panihar village while the lowest incidence (2.67%) occurred in Patai village. In Morena district, Mitawali village reported the highest disease incidence of 18.67% whereas Joura village showed the lowest of 1.33%. In Shivpuri district, disease incidence varied from 2.67% in Karsena village to 20.00% in Karyawati village. Disease sample was also be collected and brought to the laboratory for isolation.