1Plant Protection College，Shenyang Agricultural University，Shenyang 110866，Liaoning，China；2 Institute of Vegetables and Flowers，Chinese Academy of Agricultural Sciences，Beijing 100081，China
摘要 采用盆栽法与田间药效小区试验法，测定5% 烯酰吗啉粉尘剂喷粉施药对黄瓜霜霉病（Pseudoperonospora cubensis）的防治效果。结果表明：采用5% 烯酰吗啉粉尘剂喷粉施药，对黄瓜霜霉病具有良好的防治效果，对黄瓜无药害。盆栽试验中，按11.25 g a.i.·（667 m2）-1 剂量喷粉施药1 次，防效为89.13%；田间试验中，按11.25 g a.i.·（667 m2）-1 剂量间隔7 d 喷粉施药3 次，第3 次施药7 d 后的防效达86.64%
Abstract：The control efficacy of 5% Dimethomorph DPC on cucumber downy mildew caused by Pseudoperonospora cubensis was evaluated by pot experiment and field plot trial method. The results showed that 5% Dimethomorph DPC presented a good control effect on cucumber downy mildew. The pot trial efficacy of 5% Dimethomorph DPC with dosage of 168.75 g a.i.·hm-2 on cucumber downy mildew was 89.13%，and the final field control efficacy of plot trial was 86.64%，with a dosage of 168.75 g a.i.·hm-2 dusting for 3 times at 7 days intervals. There was not any phytotoxicity on cucumber.
