核桃种植历史悠久，但由于管理粗放，常产生病虫害，影响了核桃的产量和质量。经我们试验观察，摸索出了核桃主要病虫害的发生规律及防治方法。一、核桃黑斑病１、发生规律。该病的病原为一种细菌，病菌主要在病枝、病果、病芽和昆虫体上越冬，借风、雨、昆虫、带病花粉及人为 Walnut cultivation has a long history, but due to extensive management, often produce pests and diseases, affecting the yield and quality of walnuts. After our experimental observation, found out the main pests and diseases of walnuts occurrence and prevention methods. First, the black walnut disease 1, the occurrence of law. The pathogen of the disease is a kind of bacteria, the bacteria are mainly in the diseased branches, diseased fruit, disease buds and insect body overwinter, wind, rain, insects, diseased pollen and human