MANAGEMENT OF Bipolaris oryzae ON HYBRID RICE SEEDS TREATED WITH VITAFLO 200FF
Seeds of hybrid rice varieties, viz., Heera-1, Heera-2, Heera-5 and BRRI dhan-29 were collected from 15 different locations of Mymensingh district in Bangladesh. Management of Bipolaris oryzae was studied in 2015 at Seed Pathology Centre, Bangladesh Agricultural University and Seed Pathology Laboratory of Supreme Seed Company Limited. Solar heat, Soaking in water, washing, Provax 200WP, Vitaflo 200FF, Bavistin, IPM bio pesticide and BAU fungicide treatments were used for management of Bipolaris oryzae. The data collected from the experiments were analyzed for test of significance and compared the treatment means by using DMRT at 5% level of probability following the Statistical tool for Agricultural Research (STAR) 2.1 program. Highest control was recorded by Vitaflo200FF (0%) which was significantly different followed by provax (0-2%), BAU fungicide (2-3%) and IPM bio pesticide (2-3%). Incidence of B. oryzae was recorded 12-16% after seed washing, 14 -18% after solar heat, 18 -20% after seed soaking and no effect when seed treatment with Bavistin. Vitaflo 200 FF was excellent in controlling seed-borne B. oryzaein hybrid rice seed and consequently the germination percentage was high.