渭南市临渭区核桃干腐病调查与防治

摘要

The dry rot disease of Walnut （Juglans regia） is new to Linwei district. It often occurs to different degrees in the south tableland of Linwei. The investigation showed its incidence rate to be 7.43 to 25.25 and index of infection 2.07 to 12.25. The most serious harmfulness occurred to the plants of 5 to 7 yeas old. The disease normally starts from the late April. The degree of harmfulness vary with the management levels. The integrated control can produce effective results.%核桃干腐病是临渭区核桃林的一种新病害。经过对临渭区核桃基地干腐病发生情况调查分析,表明核桃干腐病在临渭区各地均有不同程度发生,株发病率为7.43%～25.25%,病情指数2.07～12.25。受害最重的是5～7年左右刚结实的核桃树。该病每年4月下旬始发,至10月下旬以菌丝体在病组织上越冬。发病程度与核桃园管理水平有密切关系,针对核桃干腐病的发生危害程度提出了核桃干腐病的综合防治方案。