1. Choose disease resistant varieties. 2. Clear the pathogen. Persist in the removal of dead leaves and diseased leaves each year to reduce the pathogens. 3. Increase resistance. Strengthen field management, rational fertilization, increase application of phosphorus and potash fertilizers, clean drainage, eliminate watering by spraying, moderate pruning, cultivate soil with loose soil, increase root activity, increase growth, and increase plant resistance to disease. 4. Chemical control. In the Spring of the following year, in the Chinese rose and rose germination, crystal lime sulfur was sprayed 100 times. In the Summer, when the new leaves were newly developed, spraying began until Winter. Alternately spray 75% chlorothalonil wettable powder 1000 times, or 45% Thiabendazole (Tecdo) suspension 500 to 600 times, and 40% fluorosiliconazole or 25% myclobutanil 800 times. Or 40% polysulfide suspension or 50% anthraquinformamide WP or 50% compound thiophanate WP 800 times, 70% thiophanates 700 to 1000 times, 50% eutectic 800 Up to 1000 times solution, 80% 800% solution of dexamethasone, 12.5% ​​of clear solution (mottled off), 1000 times of emulsion solution, sprayed once a day for 7 days during the rainy season, and sprayed once every 7 to 10 days during the normal growing season and the rainy season. Spray 4 to 5 times to control the spread of the disease. When the disease is severe, 70% can be sprayed, 30% copper oxychloride suspension is 800 times, 75% chlorothalonil is 500 times, 12.5% ​​can be diluted with 1000 times, and even sprayed 3 to 5 times, 7 to 10 times. Sprayed once a day.

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