１水稻小球菌核病的特征最初侵害稻秆下部叶鞘和茎秆，在近水面的叶鞘上产生黑色小斑，随之小斑逐渐向上下和内侧扩展，形成黑色纵向的坏死线条至黑色大斑。病斑表面着生稀薄和浅灰色霉层，病鞘内表面尚结有菌核。病菌侵入茎秆后继续扩展，造成茎秆基部成段变黑软腐，最后... 1 The characteristics of S. capsulosa initially impacted the leaf sheaths and stems in the lower part of the rice straw and produced small black spots on the leaf sheaths near the water surface. As a result, the small spots gradually expanded upwards and downwards to the inside to form black longitudinal necrotic lines to the large black spots . Lesions on the surface of thin and light gray mildew, disease sheath surface still has sclerotia. After the bacteria invade the stalks continue to expand, resulting in stalks turn into black and soft rot, and finally ...