Prevention and cure method

① Select excellent disease-resistant varieties.

(2) after autumn, clear the litter and burn it in time.

③ Strengthen cultivation management, pay attention to shaping and pruning, and be ventilated.

(4) Spraying 50% carbendazim wettable powder 500- 1000 times, or 75% chlorothalonil 500 times, or 80% zineb 500 times, 7- 10 day for 3-4 times.

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