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由杭州郊区水稻叶围分离得到ＢａｃｉｌｕｓｓｕｂｔｉｌｉｓＡ３０菌株，平板检测表明它对Ｘａｎ－ｔｈｏｍｏｎａｓｏｒｙｚａｅｐｖ．ｏｒｙｚａｅ、Ｒｈｉｚｏｃｔｏｎｉａｓｏｌａｎｉ、Ｆｕｓａｒｉｕｍｍｏｎｉｌｉｆｏｒｍｅ和Ｍａｇｎａｐｏｒｔｈｅｇｒｉｓｅａ等多种水稻病原真菌、病原细菌均有很好的拮抗作用．以水稻白叶枯病、水稻纹枯病为代表进行小区试验，结果表明，Ａ３０菌株的防病效果分别为５８．１％和３９．０％．Ａ３０菌株的培养去菌液经７０％饱和度（ＮＨ４）２ＳＯ４处理，拮抗物可被（ＮＨ４）２ＳＯ４沉淀，其拮抗粗提液经Ｄｉｏｌ１５０及ｐｒｏＲＰＣＨＲ５／１０等色谱柱分离得到两种对Ｘ．ｏｒｙｚａｅｐｖ．ｏｒｙｚａｅ的拮抗峰和两种对Ｒ．ｓｏｌａｎｉ的拮抗峰．
Bacillus subtilis A30 strain was isolated from the rice leaves in the suburbs of Hangzhou, and its plate test showed that it was against Xan-thomonasoryzaepv. oryzae, Rhizoctoniasolani, Fusariummoniliforme and Magnaporthegrisea and other pathogenic fungi, pathogenic bacteria have a good antagonistic effect. The district trials represented by bacterial leaf blight and rice sheath blight were carried out. The results showed that the control effect of A30 was 58.1% and 39.0% respectively. The culture of A30 strain was treated with 70% saturation (NH4) 2SO4, and the antagonist was precipitated by (NH4) 2SO4. The antagonistic crude extracts were separated by Diol150 and proRPCHR5 / 10. oryzaepv. Antagonistic peaks of oryzae and two pairs of R. solani antagonistic peak.