稻瘟病是我州水稻上的主要病害,大流行年造成大面积成灾,严重减产,非流行年常在感病品种上出现灾情。近年来,广大群众采用以丰产抗病品种为中心的综合防治措施后,危害显著减轻。如1974年龙山县桂塘公社农科站130亩双季早稻,由于种植了广解9号、广陆矮4号、二九青等感病品种,结 Rice blast is the main disease on rice in our state. The pandemic year has caused widespread disaster and severely cut down the output of non-endemic perennial strains on susceptible varieties. In recent years, the general public adopted the comprehensive prevention and treatment measures centering on high-yielding and disease-resistant varieties, and the harm has been significantly reduced. As in 1974 Longshan Guitang commune agricultural station 130 acres of double crop early rice, due to the planting Guangmai 9, Guanglu Dwarf 4, 29 green and other susceptible varieties, knot