Screening of lentil genotype against collar rot of lentil caused by Sclerotium rolfsii Sacc. Under field conditions

Abstract

Total 271 lentil entries received from AICRP-MuLLaRP (All India Coordinated Research Project) on lentil, were evaluated at Raipur under field condition during the year 2018-19 and 2019-20 to identify sources of genetic resistant against collar rot disease incited by the fungus Sclerotium rolfsii. The fungus was isolated from diseased lentil plants collected from research farm at seedling and vegetative stage of the crop, purified and maintained on PDA for further screening process. Total 271 lentil entries were screened against collar rot disease, out of which 139 entries were screened during 2018-2019 while, 132 entries were screened in 2019-2020. During first rabi season 2019-2020, all lentil entries were susceptible to highly susceptible to collar rot. While, during second rabi season 2018-19, Only 3 germplasm, DPL-62, VL-1 and VL-4, were found highly resistant to this disease, whereas, 10 germplasm DPL-15, ASHA, NDL-1, PL-5, Ranjan, PL-406, PL-234, VL-103 Kirsey fokar and Dehati Masoor were identified as resistant. Rest of germplasm lines were found from susceptible to highly susceptible to the “disease.