水稻病害生防细菌的筛选及其生物活性测定

从健康水稻植株体表筛选对稻瘟病等水稻主要病害有益的生防细菌 ,在室内分离到对稻瘟病等病菌菌丝具有很强抑制能力的细菌菌落 2 7株 ,经室外试验测定 ,有 9个细菌菌落对稻瘟病、纹枯病等具有一定的防治作用。其中 ,G_0 5的防治效果最佳 ,叶瘟、穗颈瘟防效分别为 5 0 8%和 4 4 7% ,纹枯病的防效达到 4 6 1% ,是一个非常有应用前景的菌株

Selection of Biological Control Agents Against Rice Diseases and Determination of Their Biological Activity

To isolate biocontrol bacteria from healthy rice plants,which belong to different areas in Jilin province,and studying on biological activity against the pathogen of rice diseases such as rice blast ( Magnaporthe grisea ) and rice sheath blight( Rhizoctonia solani ).Twenty_seven isolates produced inhibitory effect against M.grisea in the laboratory.And nine isolates were against both P.oryzae and R.solam. Among 4 tested isolates,G_05 was the best one against M.grisea and R.solam, which produced 50.8% and 44.7% control effect respectively to leaf blast and neck blast,and produced 46.1% control effect to rice sheath blight.G_05 was a good potential microbial control agent.