Protected cucumbers focus on ecological control. See methods for downy mildew. When the drug must be used, optional dust method: spray 10% B drops of dust, or 5% chlorothalonil or 10% copper grease dust, 1kg per 667 square meters. Exposure and cultivation of open rain, prevention and control of preventive chemicals, spraying 2% kasugamycin (additional rice) liquid agent 26-54mg/L or 47% spring in the initial stage of disease or the beginning of spreading. King copper (garinon) Wet powder 700 times, 78% wave. Manganese zinc (Cobo) wettable powder 500 times or 40% bacteria crack Wettable powder 600 times, 50% Chlorobromoisocyanuric acid Soluble powder 1200 times, 60% Copper cadmium. Aluminium. Zinc wettable powder 500 times, 53.8% can kill dry suspension 1000 times, 667 square meters spray good liquid 60 ~ 75 (L), even against 3 to 4 times.
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