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Rice leaf blight disease is one of the common diseases in rice-growing countries, including Vietnam. Research methods were conducted such as assessing the growth of microorganisms, to determine the antagonism of microorganisms, the ability to co-grow, the effectiveness of products, to assess the toxicity of probiotics... The research results showed that the bacterial strains belonging to the actinomycete groups Steptomyces sp., Bacillus spp are capable of antagonizing against Xanthomonas oryzae pv.oryzae (Xoo) causing bacterial leaf blight disease, with 4 strains of bacteria PD17, PD13.1, KND, KXT1 and 2 strains of actinomycetes XKBL2 and XKBL3; Identified suitable conditions for growth: temperature 20C-50C, pH 5.5-8, fermentation environment to produce probiotics (7-day for fermented powder and 5-day for fermented liquid). The probiotics production process was experimented in laboratory, through practical tests, evaluation of suitability, toxicity test, calculation of economic efficiency and then confirmed to practical effection in Moc Bac Cooperative, Duy Tien district, Ha Nam province.

khoa học công nghệ/khoa học và công nghệ online/tnu journal of science and technology

RESEARCH ON PRODUCTION OF ENVIRONMENTALLY FRIENDLY ANTAGONISTIC MICROORGANISMS IN THE PREVENTION OF RICE BLIGHT DISEASE FOR AGRICULTURAL PRODUCTION IN VIETNAM