6%嘧肽菌净水剂防治黄瓜白粉病药效试验

室内盆栽试验结果表明，6％嘧肽菌净水剂防治黄瓜白粉病效果优异，兼有保护和治疗作用。质量浓度在60mg/L以上时，其防效均高于常用药剂三唑酮（150mg／L），苗期施用150mg/L的药液，防效可达80％以上。初步研究表明该药剂具有内吸传导性能，既可向上传导也可向下传导，以向下传导为主。保护地防效试验中6％嘧肽菌净水剂质量浓度为75mg/L对黄瓜白粉病的相对防效达83．85％，显著优于对照药剂15％三唑酮粉剂300mg／L，并且对黄瓜安全。

Control Effect of Mitaijunjing 6% AS against Cucumber Powdery Mildew

Potted experiments were conducted to determine efficiency of the 6% Mitaijunjing aqueous solutions(AS) against cucumber powdery mildew. The result showed that Mitaijunjing has protecting and curing effects on Sphaerotheca fuliginea. Mitaijunjing AS is a mixed bioformulation consisting of a novel biological fungicide Cytosinpetidemycin and copper sulfate. With a concentration over 60 mg/L, the control efficiency of Mitaijunjing against cucumber powdery mildew was better than that of Triadimefon(150 mg/L). The control efficiency of Mitaijunjing at 150 mg/L suspension in cucumber seedling stage was over 80%. Mitaijunjing possessed good systematic which was able to conduct up and down in plants, and the downward conductivity was dominant. Mitaijunjing 6% AS diluted at 75 mg/L provided 83.85% relative control effect, which was significantly better than that of Triadimefon 15% WP at 300 mg/L in the field experiments. Mitaijunjing is safe to cucumber leaves and fruits in all experiments.