Agricultural control: Control nitrogen fertilizers, increase phosphorus and potassium fertilizers, and avoid leggy. Strengthen shelf management and improve ventilation and light transmission conditions.
Chemical control: Combine and prevent other diseases before germination, spray 5 waves of US-Stone sulfur. Regularly spray protection after flowering. Commonly used pharmaceuticals are a small amount of lime Bordeaux mixture 220,240 times, or 75% chlorothalonil WP 800 times, 80% of Dasheng M-45 WP 800 times.
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