Autumn spinach should be heavy against downy mildew

Downy mildew is a common disease in the production of protected spinach, especially in autumn.

Diseases generally occur severely in heavily populated and densely planted plots or in sheds with excessive watering volume.

Prevention and treatment of spinach downy mildew Note: selection of disease-resistant varieties, a reasonable rotation, downturn rotation, reasonable dense planting, increase phosphorus, potash fertilizer; pay attention to control the water, reduce the greenhouse humidity.

At the early stage of disease, chemical prevention and control methods can be adopted in a timely manner. Promazine (72.2% Prokary) water solution 800 times fluid or Ezine (64% antivirus) wettable powder 500 times fluid, or metalaxyl Ledomir), mancozeb (Dasheng, Puke), triethylaluminophosphate (aluminium diethyl bromide, epimedium). Pay attention to the use of the above-mentioned agents or compounding agents, such as 58% metalaxyl MnZn wettable powder 500 times. Every 7~10 days, spray 2~3 times continuously. In the evening room, 45% chlorothalonil smoke and 15% downy mildew can be used to prevent disease.

Bio-pesticides can be used with 0.3% matrine pesticide 500 to 800 times, spray control.

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