How to prevent pear black spot
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A: Implement bagging to protect the fruit and clean the orchard. The diseased shoots were promptly cut off before germination and the diseased leaves and diseased fruits in the orchard were removed. Strengthen cultivation management. Increase organic fertilizers to avoid overshooting shoots due to partial application of nitrogen fertilizer. Rational pruning maintains good ventilation and light transmission between the crown and the plant. Immediately spray, spray a 3 to 5 Baume degree lime sulfur before germination, after flowering in conjunction with the prevention of other diseases in accordance with the rainfall, spray a fungicide every 15 to 20 days to protect the fruit and leaves. The agent can be used 1:2:200 times Bordeaux mixture, 70% mancozeb wettable powder, 50% chlorothalonil wettable powder and so on.