1989年6月遵化县兴旺寨乡西大峪村果农王厂新在防治枣树刺蛾时使用40％乐果乳油1000倍液喷布,喷后当天发现叶片开始出现萎蔫下垂现象,次日叶片从边缘向叶脉维管束开始坏死并出现落叶,3～5天内喷药树叶片全部落光,而未用药树叶片则生长正常。在该县的枣产区鲁家峪乡,用乐果防 June 1989 Zunhua County Zhaixiang Township Xida Yucun Guo Nong Wang Wang jujube in the control of jujube tree moth when the use of 40% dimethoate 1000 times the spray, the day after the spray found that the leaves began to wilting sagging phenomenon, the next day The leaves began to necrosis from the edge of the vascular bundle to the veins and the emergence of deciduous leaves, 3 to 5 days all the falling leaves of the spray medicine, while the growth of the leaves without the normal growth. In the county’s jujube producing area Lu home Yu Township, with music prevention