稻粒黑粉病是水稻开花受精后由担子菌侵染花器、子房或幼嫩谷粒引起的一种谷粒病害,是近年来杂交稻制种田普遍发生的主要病害,其防治措施如下: 1.花期防疫。①70%甲基托布津可湿性粉剂100克/亩,兑水50公斤,于母本盛花期喷雾防治1次,防效可达84.19%;于母本初花、盛花期各施药1次,防效可达90.34%。②50%多菌灵可湿性粉剂150克/亩,兑水50公斤,于母本盛花期喷施1次,防效可达88%;于母本初花、盛花期各喷1次,防效可达93%。③20%粉锈宁乳油150毫升/亩,兑水50公斤,于母本盛花期喷施1次,防效可达75%;初花期加施药1次,防效可达80.17%。④ Rice powdery mildew is a kind of grain disease caused by basidiomycetes invaded by basidiomycete after flowering and fertilization. It is the common disease in hybrid rice farming in recent years. The control measures are as follows: 1. Flowering epidemic prevention. ①70% thiophanate-methyl wettable powder 100 g / mu, watered 50 kg, sprayed in the female flower bloom control 1 time, the control effect of up to 84.19%; in the female primrose, full flowering each application 1, Control effect up to 90.34%. ② 50% carbendazim WP 150 g / mu, watered 50 kg, bloom in the female parent spray 1, the control effect of up to 88%; Up to 93%. ③ 20% pendululin EC 150 ml / mu, watered 50 kg, sprayed once at the flowering stage of mother flowers, with anti-efficacy up to 75%; first flowering plus application of pesticide once, anti-efficacy up to 80.17%. ④