50％醚菌酯干悬浮剂防治西葫芦白粉病的试验

白粉病是西葫芦重要的病害之一，为明确醚菌酯对白粉病的防治效果，笔者进行了50％醚菌酯DF防治西葫芦白粉病的比较试验。试验表明，50％醚菌酯DF对西葫芦白粉病有良好的防治效果，每667m^2使用商品量15g、30g经处理2次后10d对西葫芦白粉病的防效分别达85．02％、81．14％，其防效均优于25％丙环唑EC20g／667m^2、15％三唑酮WP100g／667m^2．20％粉锈威100g／667m^2的防效。醚菌酯是对有益生物低毒、对环境安全的新型仿生杀菌剂，值得推广应用，推荐使用剂量为15-30g／667m^2。

An experiment of 50% kresoxim-methyl's dry suspending agent to control vegetable marrow's powdery mildew

Powdery mildew is one of the major the control effect of kresoxim-methyl on powdery to use the agent for controlling the disease. The diseases of vegetable marrow and in order to ensure mildew, the writers have conducted a plot experiment experimental results show that the agent has a good control effect on vegetable marrow＇s powdery mildew. Usage of 15g and 30g/667m^2 twice and 10d after application,the control effect can reach to 85.02% and 81.14% ,which is better than other three agents. Kresoxim-methyl is a kind of new bio-friendly,low-toxin and environment-safety bactericide, which is worth to be extended and the suggested dosage is 15-30g/667m^2.