1. Clear the garden thoroughly to reduce the source of the disease. Combined with pruning and promoting tipping, all diseased leaves were removed 20 days before flowering at the end of winter and early spring, and then sprayed with 2 to 3 times of Baume 0.8-degree lime sulfur, so that it could produce strong autumn shoots, increase tree vigor and reduce the source of disease.
2. Rational use of medicine. With Bordeaux mixture, copper ammonium mixture, sulfur suspension agent to prevent scab. The specific spraying time and method are as follows: spray 45% sulfur suspension 200 times at the beginning of bud, and spray 1% equal amount of Bordeaux 2/3, then spray 7 times of ammonium hydroxide reagent 7 days later. , Spray the sulphur suspension 200 times at the end of the next 10 days or so.
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