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梨黑星病是宁陵县酥梨栽培上的主要病害之一。近几年，由于防治用药混乱，病菌抗性增强，发病呈上升趋势。故此，我们于1992～1995年对梨黑星病的发病规律、发病因子及防治药剂进行了调查和试验，初步探索出切实有效的防治措施。1梨黑星病发病规律1．1越冬和再浸染据观察，梨黑
Pear scab is one of the main diseases in the cultivation of pear in Ningling County. In recent years, due to the confusion of drug prevention and control, the resistance of germs is increased, and the incidence is on the rise. Therefore, we investigated and tested the pathogenesis, pathogenesis and prevention and cure of pear scab in 1992 ~ 1995, and initially explored practical and effective prevention measures. 1 pear scab incidence of 1.1 overwintering and re-dip According to the observation, pear black