大棚苦瓜白粉病田间药效试验

Field Efficacy Test for Controlling Powdery Mildew of Greenhouse Bitter Gourd

开展了四氟醚唑、醚菌酯、丙环·醚菌酯、甲基硫菌灵4种药剂防治大棚苦瓜白粉病的田间药效试验。试验结果表明,4种药剂均可有效控制大棚苦瓜白粉病发展,且对苦瓜安全无药害,以32%丙环·嘧菌酯悬浮剂1 500倍液防效最好,其次是4%四氟醚唑水乳剂1 000倍液、50%醚菌酯水分散粒剂2 000倍液、70%甲基硫菌灵可湿性粉剂600倍液,在生产上防治时可交替使用。

The field efficacy test of four kinds of insecticides,tetraconazole,azoxystrobin,propiconazole+azoxystrobin,thiophanate-methyl,to control the powdery mildew of greenhouse bitter gourd was carried out.The results showed that four kinds of insecticides could effectively control the powdery mildew development of greenhouse bitter gourd,and had no phytotoxicity to bitter gourd.The controlling efficacy of 32% propiconazole +azoxystrobin suspension agent 1 500 times fluid was the best,followed by 4% tetraconazole emulsion in water 1 000 times fluid,50% azoxystrobin water dispersible granule 2 000 times liquid,and 70% thiophanate-methyl wettable powder 600 times liquid.In the prevention and control of production they could be used alternately.