通过研究江苏省如皋市水稻穗瘟发生危害实际情况,明确了稻穗瘟的病情消长规律、主要影响因子、不同发病程度的产量损失率;明确了52%多.三环WP的最佳用药时间、用药次数、合理用药量、防治效果,并进行了大面积推广应用,经济、社会效益显著。 By studying the actual situation of the occurrence of rice panicle blast in Rugao, Jiangsu Province, the disease growth and decline pattern, main impact factors and yield loss rate of rice blast were clarified, and the best treatment time was defined as 52%. , The number of medication, reasonable dosage, prevention and control effect, and carried out a large area of ​​promotion and application, economic and social benefits significantly.