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.