In the recent past, downy mildew has been severe and care should be taken. The downy mildew of spinach mainly damages the leaves. The lesions are light green dots at the beginning, and the edges are not obvious. After expansion, they have irregular shapes and sizes, with diameters of 3 to 17 mm. When the humidity is high, gray and mildew layer is formed on the leaves on the back. After the gray and purple. The lesions spread upward from the lower part of the plant. During drought, the diseased leaves were yellow, and when the humidity was high, they were more rotten. The diseased leaves of the whole plant turned yellow and died, and the vegetable was atrophic.
At the beginning of the disease, spray 80% triethylaluminum phosphonate 500 times, or 64% rime Mn-Zn wettable powder 500 times, or 58% metalaxyl manganese zinc 500 times, or 72.2% propamocarb hydrochloride 800 times Liquid and so on, 7 days once, continuous control of 2 or 3 times, can effectively control the downy mildew hazards. When the heavy land masses are sprayed, the concentration of the liquid medicine can be appropriately increased, but not excessive so as not to cause phytotoxicity. At the same time, it can be combined with spraying foliar fertilizer and plant growth regulators for prevention and treatment. Serious wards should be implemented for 2 to 3 years of rotation, to strengthen the cultivation and management, so that the appropriate density, scientific irrigation, reduce the humidity in the field.
At the beginning of the disease, spray 80% triethylaluminum phosphonate 500 times, or 64% rime Mn-Zn wettable powder 500 times, or 58% metalaxyl manganese zinc 500 times, or 72.2% propamocarb hydrochloride 800 times Liquid and so on, 7 days once, continuous control of 2 or 3 times, can effectively control the downy mildew hazards. When the heavy land masses are sprayed, the concentration of the liquid medicine can be appropriately increased, but not excessive so as not to cause phytotoxicity. At the same time, it can be combined with spraying foliar fertilizer and plant growth regulators for prevention and treatment. Serious wards should be implemented for 2 to 3 years of rotation, to strengthen the cultivation and management, so that the appropriate density, scientific irrigation, reduce the humidity in the field.
Ivacaftor Cas 873054-44-5,Iva-Int Cas 13721-01-2,Tezacaftor Cas 1152311-62-0,Lumacaftor Cas 936727-05-8
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