It has entered the season of high incidence of downy mildew in melons.
Precaution can be used to protect against downy mildew. Applicable drugs include chlorothalonil and mancozeb. The protective field can use chlorothalonil and smoke agent to appear in the disease center. Therapeutic agents, such as fast-acting net 52.5%?f ketone urea cyanide water dispersible granules 1500 times, or Kelu 72% frost urea manganese zinc wettable powder 600-800 times, or Prec 72.2% downy mildew Hydrochloric acid salt water agent 600-700 times spray control; If the disease is slowed down after the drug, can be changed to 80% eth phosphine manganese zinc WP 500 times after 7 days, or chlorothalonil control 2-3 times to Reducing the cost of medications and at the same time avoiding the development of resistance to the above-mentioned agents by pathogenic bacteria; if the conditions of the two drugs are changed after the use of these two drugs, they can be replaced with the above-mentioned agents. Protected areas should be sprayed on sunny mornings, after the medicines are closed to raise temperature, so that the leaf surface moisture quickly evaporates, and then open the joints to eliminate moisture.
In addition to the above-mentioned agents, there are currently a variety of agents for the control of melon downy mildew. Such as 50% dimethomorph WP, 30-40 grams per acre; Amisida 25% azoxystrobin suspension, 30-40 ml per acre; Baitai 60% oxime ether water-dispersed Granules, 40-60 grams per acre; Kairun 25% pyraclostrobin EC, 20-40 ml per acre
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