近年来,水稻黑粉病在全国各地杂交水稻制种田普遍发生,并逐年加重,迅速蔓延扩展。我区政和县1987年秋季制种的威优64,种子黑粉病粒率高达12—18%,严重的影响了种子质量。1987年12月,根据精选机的功能用精选机清除水稻种子黑粉病粒,效果显著。经过 In recent years, the incidence of rice powdery mildew in hybrid rice farming throughout the country generally occurs, and increased year by year, rapid expansion and expansion. My district government and the county in autumn 1987 wei 64, 69% of the seed black powder disease, seriously affecting the quality of the seed. December 1987, according to the function of sorting machine with a selection of machines to remove rice seeds black powder tablets, the effect is significant. after