稻粒黑粉病俗称乌谷,黑穗病,是由病菌厚垣孢子浸染引起的一种真菌性病害。近年来该病害在杂交水稻制种田中时有发生,已成为制种生产中的主要病害之一。 据浙江永康县调查,从1976年大面积制种以来,到1983年全县各制种基地未出现过此病害。1984年有少量零星发生,发病率只占0.5— Rice grain powder disease commonly known as black valley, smut, by the bacteria chlamydospores caused by a fungal disease. In recent years, the disease occurs in hybrid rice farming, which has become one of the main diseases in seed production. According to a survey conducted by Zhejiang Yongkang County, since the large-scale seed production in 1976, the disease did not occur in all seed production bases in the county in 1983. A small number of sporadic occurrence in 1984, the incidence rate of only 0.5-