稻粒黑粉病俗称黑穗病。以前在中熟籼或晚熟籼稻上偶尔出现少数病粒,对产量影响甚微,未引起人们注意,但自推广杂交稻后,此病有所发展,特别在近年杂交稻制种的母本上最为突出。1987年我县杂交制种穗发病率达80％,粒发病率达5～15％,高的达20％以上。按此计算,每亩损失杂交种15～30公斤。价值50～100元,严重影响了杂交稻种的产量、质量的提高与制种户的经济收益。 Rice powdery mildew disease commonly known as smut. Occurred in the moderate or late indica indica hybrid rice occasionally a small number of particles, the output had little effect, did not draw attention, but since the promotion of hybrid rice, the disease has been developed, especially in recent years, hybrid rice seed mother The most prominent. In 1987, the incidence of hybrid seed in my county reached 80%, the incidence of grain reached 5 to 15% and the height was over 20%. Click here to calculate, loss of hybrids per acre 15 to 30 kg. The value of 50 to 100 yuan, seriously affected the yield of hybrid rice varieties, improve the quality and economic benefits of seed production households.