Vol. 11, Issue 6 (2022)

Author(s):
Ashwini E, V Pandey, A Upadhyay, S Nema, SK Singh, Y Singh and S Kurmi

Abstract:
Lentil occupies a unique position in the world of agriculture, as a pulse crop the majority of world production comes from Canada (68%), followed by India (33%). Collar rot of lentil disease caused by Sclerotium rolfsii Sacc. is very important and a polyphagus pathogen causing substantial losses in quality and productivity of yield. The lentil plants showing characteristic collar rot symptoms were collected from different lentil growing districts of Madhya Pradesh. Variability was observed among the isolates of S. rolfsii in their mycelial characters, sclerotial characters and pathogenic characters. It was found that all the six isolates collected from different districts of central zone of Madhya Pradesh were showing significant difference in their growth rate, colony type, mycelial appearance, and color of sclerotia, pattern sclerotia production, days taken for sclerotial production and number of sclerotia per plate. Pathogenic variability was also observed in all six isolates from less severe to more severe. In vitro evaluation of five fungicide mixtures revealed that, Azoxystobulin + Difenconozole, Hexaconozole and Azoxystobulin was found most effective against the Sclerotium rolfsii Sacc. at all the tested concentrations.