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【目的】针对打瓜白粉病在新疆严重危害的现状,研究6种杀菌剂对打瓜白粉病的田间防治效果。【方法】采用田间小区试验,比较6种药剂的防效差异。【结果】两次施药后第14 d,10%苯醚菌酯悬浮剂5000倍液防效最高,防效达73.80%。10%苯醚菌酯悬浮剂10 000倍液、50%醚菌酯水分散粒剂3 000倍液、400 g/L氟硅唑乳油7 500倍液和25%乙嘧酚悬浮剂1 500倍液的防效也较好,药后14 d分别达69.69%、69.56%、68.48%和67.32%。【结论】4种药剂防效较好,推荐在生产中交替使用。提出了打瓜白粉病防治原则,明确了该病的初侵染来源和防治始期。防治打瓜白粉病的关键是抓住发病始期,选用高效杀菌剂及时喷药。
【Objective】 The objective of this study was to investigate the effects of six fungicides on the prevention and control of melon powdery mildew in the field of severely harmed melon powdery mildew in Xinjiang. 【Method】 The experiment of field plot was used to compare the control efficacy of 6 kinds of medicaments. 【Results】 The results showed that the control effect of 10% phenylsofenac suspension 5000 times was the highest on the 14th day after the two pesticides were applied, with the control efficiency of 73.80%. 10% phenylsuccinate suspension 10 000 times, 50% Ketogenic ester water dispersible granules 3000 times, 400 g / L of flusilazole 7 500 times and 25% The control effect of liquid was also good, reaching 69.69%, 69.56%, 68.48% and 67.32% respectively on the 14th day after treatment. 【Conclusion】 The four kinds of medicaments have good control effects and are recommended to be used alternately in production. Put forward to fight the melon powdery mildew prevention principle, clear the source of the initial infection and prevention and cure of the disease. Prevention and control melon powdery mildew is the key to seize the onset of the disease, the choice of efficient fungicides timely spraying.