为筛选高效低毒且对甜瓜细菌性果斑病防效较佳的农药试剂，以砂地甜瓜为研究对象，对9种高效低毒杀菌剂进行了田间筛选试验。结果表明，供试的9种药剂对甜瓜细菌性果斑病均具有一定的防治作用。77%硫酸铜钙可湿性粉剂500倍液第1次和第2次喷药7 d后防效均在70%以上，且第2次防效比第1次上升1.55个百分点，防治效果最佳。建议在白银市甜瓜果斑病防治中优先选用77%硫酸铜钙可湿性粉剂500倍液喷雾防治。

In order to screen efficient and low toxicity pesticide reagents with better control effect on Acidovorax citrulli of muskmelon, in this experiment, the muskmelon in sandy land of Baiyin City was taken as the research object, and the field screening test was carried out on 9 kinds of highly effective and low toxic bactericides. The 9 tested bactericides all had certain preventive and therapeutic effects on Acidovorax citrulli in muskmelons. Control effects after 7 days using 77% Copper(II) sulfate calcium wettable powder 500 times dilution for 1-time and 2-time spray were all above 70%, and the 2-time control effect was 1.55 percent higher than that of the 1-time treatment, which showed the best control effect. Therefore, spraying 77% Copper(II) sulfate calcium wettable powder 500 times dilution are recommend in the prevention and control of muskmelon Acidovorax citrulli in Baiyin City.

S652

白银市科技局项目(2021-1-4N)。