20%酮.甲可湿性粉剂防治小麦白粉病的田间药效试验结果表明:20%酮.甲可湿性粉剂商品用量900、1 200、1 500 g/hm2处理药后21 d的防效分别为61.2%、67.4%、71.1%,比对比药剂15%三唑酮可湿性粉剂商品用量1 200 g/hm2分别高1.3、7.5、11.2个百分点,比70%甲基硫菌灵可湿性粉剂商品用量1 200 g/hm2分别高9.1、15.3、19.0个百分点,20%酮.甲可湿性粉剂商品量1200、1500 g/hm2处理与对比药剂药效差异均达极显著水平。 20% ketones.A field WPA test results showed that: 20% ketones.A WP dosage of 900,1 200,1 500 g / hm2 treatment of 21 d after the control effect was 61.2%, 67.4%, 71.1% compared with 15% of the comparison agent Triadimefon wettable powder The dosage of 1 200 g / hm2 was 1.3, 7.5 and 11.2 percentage points higher than that of the 70% thiophanate-methyl wettable powder 1 200 g / hm2 were 9.1, 15, 19 and 20.0% respectively, and the difference of pharmacodynamics between the two treatments was 1200,1500 g / hm2.