病害及防治方法核桃腐烂病。核桃腐烂病是一种真菌性病害,主要危害枝、干。枝条染病,一种情况表现为枝条失绿干枯,上生黑色小点;另一种情况是剪锯口处出现明显病斑,并向下蔓延,绕枝一周后形成枯梢。防治方法:加强核桃园管理,增施有机肥,合理修剪,增强树势;树干涂白;生长季节及时刮治病斑,刮后涂40%晶体石硫合剂20~30倍液、5~10波美度石硫合剂或50%多菌灵可湿 Diseases and control methods Walnut rot disease. Walnut rot disease is a fungal disease, the main hazards of branches and stems. Branches of the disease, one case showed dry green branches dry, raw black dots; the other case is obvious cut saw cut lesions, and spread down, around the branches after the formation of shoots. Prevention and treatment methods: strengthen the management of walnut orchard, increase organic fertilizer, pruning rationally to enhance the tree vigor; trunk white; growth season timely cure lesions, after scraping coated 40% crystal lime sulfur mixture 20 to 30 times, 5 to 10 Boulder limestone or 50% carbendazim can be wet