Papers

PATHOGENICITY AND CHARACTERIZATION OF SOME Sclerotium rolfsii ISOLATES (Pages : 29 - 35)

A.T.M.S. ISLAM, B. MEAH, S.M.E. HASSAN AND S.M.M. HOSSAIN

Ten isolates of Sclerotium rolfsii causal organism of foot rot of vegetables were collected from different hosts and locations of Bangladesh. Morphological characters like mycelial growth, colony colour, colony consistency, sclerotia formation in the PDA were studied. The isolate spinach showed the highest radial mycelial growth from 2 DAI to 6 DAI (1.97 cm to 9.00 cm). At 6 DAI the highest average linear mycelial growth rate was found in isoalte spinach (1.5 cm/day) which was statistically similar to the average linear mycelial growth of isolates lentil-4, eggplant and tomato-2. The highest number of sclerotia was found in the isolate lentil-1 (8.79/cm2). Pathogenicity of 10 isolates of S. rolfsii was tested and the isolate spinach was found to be highly virulent. It had significant effect on seed germination, pre-emergence death, damping off and plant stand over other isolates. Download


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