58%甲霜·锰锌可湿性粉剂防治黄瓜霜霉病药效试验

Study on the Control Effects of Metalaxyl·mancozeb 58% FS on Cucumber Downy Mildew

采用58％甲霜·锰锌可湿性粉剂防治黄瓜霜霉病。结果表明：喷雾用量为131．2～206．4g／667m^2，对黄瓜霜霉病防效达82．0％～90．4％，没有药害现象。生产上建议在黄瓜发病初期施药，每隔7d施1次，连续使用3次，每次施药量168．8-206．4g／667m^2。

The control effect of metalaxyl · rnancozeb 58% FS on Cucumber Downy Mildew was studied. The results showed that the control effect reached 82. 0%-90. 4% when metalaxyl · mancozeb 58% FS sprayed at 131.2-206. 4 g/667m^2 ,and it had no poison to cucumber. That three applications of 168. 8-206.4g/667m^2 diluent liquid were done at the proper control period of disease had a good control effect for Cucumber Downy Mildew.