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核桃是经济价值很高的果实与木材两用树种,适应性强,分布广泛,在我国大部分省区都有种植。大力发展核桃生产不仅能够增加社队收入,发展壮大集体经济,提高人民的物质生活,还可以通过对外贸易换取外汇,支援国家四个现代化建设。 但是,核桃树在生长过程中,也常因受到各种病虫害的危害,而影响到核桃的品质或造成大量的减产。为害核桃树的病虫种类很多,在病害方面有苗期发生的苗木根腐病(有菌核性和生理性两种);苗木、幼树发生的核桃炭疽病;幼树、大树发生的核桃枝枯病;叶部发生的白粉病;叶片、果实上发生的核桃细菌性黑斑病。在虫害方面有为害叶片的核桃尺蠖、
Walnut is a fruit and wood dual-use tree with high economic value. It has strong adaptability and wide distribution and is planted in most provinces and autonomous regions of our country. Vigorously developing walnut production will not only increase the income of communes and communes, expand and develop the collective economy, enhance the material life of the people, but also support foreign exchange through foreign trade and support the four modernizations of the country. However, the growth of walnut trees, often due to a variety of pests and diseases hazards, which affect the quality of walnut or cause a lot of cut. Harm the walnut tree pests and diseases are many, there are seedlings in the disease seedling root rot (both bacteria and physiological); seedlings, young trees occur walnut anthracnose; saplings, trees occur Walnut leaf blight; powdery mildew occurring in the leaf; walnut bacterial black spot occurring on leaves, fruits. Pests in the damage of the leaves of walnut ruler,