通过田间试验，比较分析了不同药剂对水稻纹枯病的防治效果。结果表明，25%嘧菌酯悬浮剂1 350 g/hm2、24%噻呋酰胺悬浮剂345 g/hm2、25%丙环唑乳油600 g/hm2对水稻纹枯病的防效均在87%以上，43%戊唑醇悬浮剂的防效为74.38%；4种药剂的田间药效比生产上常用药剂井冈霉素的防效分别提高0.79倍、0.75倍、0.69倍、0.43倍，头季和再生季每hm2综合增收6 499元、4 042元、2 051元、1 913元。从防治效果和经济效益来看，25%嘧菌酯悬浮剂、24%噻呋酰胺悬浮剂、25%丙环唑乳油均可以作为本地防治水稻纹枯病的主体药剂进行推广应用。

A field experiment was carried out to explore different fungicides and spraying times on rice sheath blight. The results showed that the control effects of azoxystrobin 25% suspension concentrate （1 350 g/hm2）, thifluzamide 24% suspension concentrate （345 g/hm2） and propiconazole 25% emulsifiable concentrate （600 g/hm2） on rice sheath blight were more than 87%, and the effects of tebuconazole 43% suspension concentrate was 74.38%. Compared with validamycin 20% wettable powder, the control effects of 4 fungicides on the field efficacy were improved by 0.79 times, 0.75 times, 0.69 times and 0.43 times, respectively, the comprehensive income per hectare were increased by 6499 yuan, 4042 yuan, 2051 yuan and 1913 yuan. According to the control effects and economic benefits azoxystrobin 25% SC, thifluzamide 24% SC and propiconazole 25% EC could be popularized as the main local pesticides in controlling rice sheath blight.