稻粒黑粉病在我县属新发生水稻病害。在推广杂交稻连年制种过程中由制种母本珍汕97A和D汕A带来此病。近几年发病普遍而严重。田间一般病穗率10—30％,病粒率10— Rice powdery mildew is a new rice disease in our county. In the promotion of hybrid rice in successive years of seed production by the seed mother Zhenshan 97A and D Shantou A bring the disease. In recent years, the incidence of widespread and serious. Field generally sick panicle rate of 10-30%, the rate of disease particles 10-