黄瓜白粉病由白粉菌引起,是大田和温室栽培黄瓜的主要病害之一。本研究在明确了溶剂(95%乙醇和环己酮)和吐温20对黄瓜植株生长及黄瓜白粉病病情无影响的前提下,配制姜黄油溶液,通过温室盆栽活体试验测定其对白粉菌的活性,得到姜黄油对白粉菌的毒力回归方程,EC_(50)为0.63 mg/L,低于对照药剂400g/L氟硅唑乳油的EC_(50)14.01mg/L。对田间成株期黄瓜进行药效试验,发现姜黄油溶液处理后的黄瓜叶片上粉斑明显减少。施用姜黄油3次,处理后7 d的病指防效分别为90.75%、88.59%、82.27%,均高于400 g/L氟硅唑乳油的防效。 Cucumber powdery mildew caused by powdery mildew is one of the main diseases cucumber cultivation in the fields and greenhouses. In this study, the solvent (95% ethanol and cyclohexanone) and Tween 20 on the cucumber plant growth and cucumber powdery mildew conditions had no effect on the premise, the preparation of turmeric oil solution, determined by greenhouse pot experiments on powdery mildew (EC 50) of 0.63 mg / L, which is lower than that of EC50 (14.01 mg / L) of flusilazole EC 400 g / L. Cucumber field efficacy test on adult plants, found turmeric butter solution treated cucumber leaf spots significantly reduced. Administration of turmeric oil three times, 7 days after treatment of the disease control effect were 90.75%, 88.59%, 82.27%, were higher than 400 g / L flusilazole EC control effect.