Powdery mildew is one of the most important diseases of the Chinese rose. It damages leaves, shoots, buds, and pedicels. The prevention and control methods are as follows: Strengthen cultivation and management to remove diseased bodies in time; pruning in time to improve ventilation and light transmission conditions; nitrogen fertilizer should not be excessive, and it should be appropriate Increase phosphorus and potassium fertilizers. Chemicals can be sprayed with 15% triadimefon 2000 to 4000 times or 50% ketorol 1000 times; 50% benzene to WP 1000 times; 30% fluconazole 800 to 30%. 1000 times liquid (pay attention to self-protection); 50% sulfur suspension agent (spray 200 to 300 times when the onset of disease, the temperature is higher than 30 degrees Celsius spray 400 to 500 times fluid). In addition, sodium fluorosulfate is a poison bait, generally used at a concentration of 15% to control pests.
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