ISOLATION AND SELECTION OF BACTERIA ANTAGONISTIC TO Pyricularia oryzae WHICH CAUSE RICE BLAST DISEASE

Abstract

Rice blast disease which is caused by P.oryzae is still being a big problem for manycountries planting rice in the world. Nowaday, the best way considered to prevent rice blast!Jisease is using chemical. However, the Agrochemical is one of the agents that make the environment polluted. Therefore, using antagonistic bacteria to restrict dispersion andpathogenous ability of P.oryzae fungi is one choice of researchers. In this paper the researching about antagonistic property of bacteria against P.oryzae is reported. There are 60 isolates ofP.oryzae is isolated and selected from 26 different rice varieties at II provinces as Ha Nam,Thai Binh, Hung Yen, Hanoi, Hai Phong, Bac Ninh, Ha Tay, Nghe An, Ha Tinh, Quang Binh and Phu Yen. The preliminary obtained 4 isolates of bacteria indicated that they strong inhibiting activity against P.oryzae.