Grapes in Tai'an City, Shandong Province have been seriously damaged by downy mildew in recent years. In order to rationally use pesticides , improve the control effect, and promote the increase of yield and income of fruit farmers, in order to provide a basis for fruit farmers to choose pesticides, the Institute of Plant Protection of Shandong Agricultural University and the Shandong Provincial Key Laboratory of Pesticide Toxicology and Applied Technology, August 8~, 2012 On the 31st, in the vineyard of Nanwangjiazhuang, Tianping Office, Daiyue District, Tai'an City, Shandong Province, it was treated with enoylmorpholine, metalaxyl 30% water dispersible granule 600 times solution, dimethomorph 40% suspension 600 times solution. Dodecylbenzylammonium chloride 10% water 1000 times solution, azoxystrobin 25% suspension 1500 times solution, nail cream · manganese zinc 72% water dispersible granule 400 times liquid, aluminum triethylphosphinate 80% Water-dispersible granules 500 times solution, mancozeb 80% wettable powder 800 times solution, and propidium zinc 70% wettable powder 400 times solution were used to compare and control the grape downy mildew agents, and the above 8 kinds were compared. The effect of fungicide treatment on the control of grape downy mildew. Before the test, the grape downy mildew in the vineyard occurred moderately. The application device is a seat type electric sprayer, and the application method is to uniformly spray the whole plant of the grape, and spray it on the leaf surface of the plant without even dropping the medicine. Finally, the significance of the difference between treatments was determined by the DMRT method.
The test results showed that 8 days (days) after the last application, enoylmorpholine metalaxyl 30% water-dispersible granules 600 times solution, dimethomorph 40% suspension 600 times solution, nail cream, manganese zinc 72% Water-dispersible granules 400 times solution, azoxystrobin 25% suspension agent 1500 times solution and dodecylbenzylammonium chloride 10% water agent 1000 times solution have good control effect on grape downy mildew, grape downy mildew The control effect is >80%, which is significantly better than the traditional agent aluminum triethylphosphinate 80% water dispersible granule 500 times liquid, mancozeb 80% wettable powder 800 times liquid, propidium zinc 70% wettable powder 400 Double liquid. Among them, the enoylmorpholine metalaxyl 30% water dispersible granule 600 times solution is particularly effective. In the test, the test concentration of the test drug was safe for the growth of the grape plants, and no adverse effects were produced.
The pesticide information network reminds the majority of fruit farmers that the occurrence of grape downy mildew has a close relationship with various environmental factors. It should pay attention to the rotation of drugs and recommend the use of compounding agents in order to reduce the cost of drugs and slow down the development of drug resistance.
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