3种烟剂防治大棚黄瓜白粉病的效果

[目的]寻找防治温室黄瓜白粉病的有效药剂。[方法]选择百菌清、灰霉净、疫霉净3种烟剂，采用烟熏法对温室黄瓜白粉病进行防治。[结果]3种烟剂中，百菌清烟剂防治黄瓜白粉病的效果最佳，在病害发生初期开始用药，每次施药量为1500 g/hm^2，施药间隔期8 d，连施4次，防治效果可达90.7%以上。[结论]百菌清烟剂可以在温室黄瓜白粉病的化学防治中大力推广。

Control Effect of Three Kinds of Smoke Agents on Cucumber Powdery Mildew in Greenhouse

[Objective]The aim of this study was to screen out the effective smoke agent to control cucumber pow-dery mildew in greenhouse. [Method]The control effects of chlorothalonil, Huimei-jing and Yimeijing smoke agent on cu-cumber powdery mildew in greenhouse were studied by the smoking method. [Result] Chlorothalonil smoke agent had the best control effect on cucumber powdery mildew. When applied the smoke at the initial occurrence period of the disease, interval eight days, four times use continuously, the control rate was up to 90.7% at the dosage of 1 500 g/hm^2. [Conclusion] Chlorothalonil smoke agent should be widely popularized for controlling cucumber powdery mildew in greenhouse.