[目的]研究噻唑锌和嘧菌酯复配对黄瓜霜霉病菌的杀菌活性,对防治黄瓜霜霉病具有指导意义。[方法]采用孢子悬浮液接种法测定,2者按6种不同比例混配后稀释成5个质量浓度进行喷雾处理,24 h后接种黄瓜霜霉病菌孢子悬浮液。[结果]噻唑锌和嘧菌酯对黄瓜霜霉病的EC50值分别为817.46、2.93 mg/L;2者以3∶2、2∶5、2∶7混配时有一定的增效作用。[结论]综合考虑经济效益和增效作用,2者以3∶2混配为最适配比。 [Objective] The research aimed to study the bactericidal activity of zinc azide and azoxystrobin against cucumber downy mildew and to guide cucumber downy mildew. [Method] The spores suspensions inoculation method was used. The two were mixed in 6 different proportions and diluted into 5 mass concentrations for spraying. After 24 h, the spores suspension of Cucumber downy mildew was inoculated. [Result] The EC50 values ​​of zinc thiazole and azoxystrobin on cucumber downy mildew were 817.46 and 2.93 mg / L, respectively. There was a synergistic effect when the two were mixed with 3: 2, 2: 5 and 2: 7. [Conclusion] Considering the economic benefit and synergistic effect, the best fit ratio of the two is 3: 2.