First of all, some bactericidal and insecticidal drugs should be used for prevention before flowering of plum trees. The dose concentration ratio of the insecticides should be smaller and can be used 20 days before flowering. Second, insecticide and bactericidal drugs were sprayed about 20 days after flowering, and prophylactic drugs were administered every 20 days or so. Finally, farmers should pay attention to strengthening preventive measures based on temperature and humidity during periods of high temperature and high humidity.
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