3种药剂防治水稻纹枯病、稻曲病和稻瘟病田间药效试验

采用田间药效试验方法,比较3种药剂对水稻纹枯病、稻曲病、稻瘟病的防治效果。结果表明:3种药剂对水稻纹枯病、稻曲病、稻瘟病都有一定防效。其中75%肟菌戊唑醇水分散粒剂225 g/hm2对水稻纹枯病、稻瘟病防效最好,防效分别为85.74%、85.19%;43%戊唑醇悬浮剂225 mL/hm2对稻曲病的防治效果最好,防效为88.25%。综合防治效果表明,75%肟菌戊唑醇水分散粒剂150～225 g/hm2对水稻纹枯病、稻曲病、稻瘟病的防效最好,43%戊唑醇悬浮剂225 mL/hm2对稻曲病和纹枯病防治效果较好,在实际生产上可广泛应用。

Control Effects of Three Fungicides on Sheath Blight, Rice False Smut and Rice Blast in Field Testing

The control effects of three fungicides on sheath blight,rice false smut and rice blast was tested in the field experiment.Results showed that three fungicides all had certain control effects on sheath blight,rice false smut and rice blast,of which 75% oxime bacteria tebuconazole WG 225 g/hm2 got the best control effects on sheath blight and rice blast,with the control effect 85.74% and 85.19% respectively,while 43% horizon SC 225 mL/hm2 got the best control effect on rice false smut,with the control effect 88.25%.The comprehensive control effects showed that 75% oxime bacteria tebuconazoleWG 150～225 g/hm2 got the best control effect on sheath blight,rice false smut and rice blast,while 43%horizon SC 225 g/hm2 got better control effects on rice false smut and sheath blight,which showed they could be widely used in the actual rice production.