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| Control Efficacy of 5% Dimethomorph DPC on Cucumber Downy Mildew |
| ZHU Fa-di1，XIE Xue-wen2，LI Jian-ming2 ，GU Zu-min1*，LI Bao-ju2* |
| 1Plant Protection College，Shenyang Agricultural University，Shenyang 110866，Liaoning，China；2 Institute of Vegetables and Flowers，Chinese Academy of Agricultural Sciences，Beijing 100081，China |
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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.
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Received: 16 April 2014
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