郑州是适宜种植多种果树的地区,现有苹果98,849亩,约2,123,280棵;梨27,533亩,约657,745棵;不少果树开始进入中、老龄阶段,由于以往管理不当,肥水不足,树体负载量过大,所以,大小年现象严重,树势日趋衰弱,遂致腐烂病严重发生。为了掌握我市苹果、梨树腐烂病的发生和防治现状以及防治中存在的问题,我们于1983年12月12日——21日,在近郊的郑州市园艺场1区、3 Zhengzhou is suitable for planting a variety of fruit trees in the region, the existing 98,849 acres of apples, about 2,123,280; pear 27,533 acres, about 657,745 trees; many fruit trees began to enter the stage of aging, due to previous mismanagement, inadequate water, tree load Too large, therefore, the size of the serious year-round phenomenon, increasingly weak decline in the tree, then the serious occurrence of rot disease. In order to grasp the city of apple, pear rot disease occurrence and prevention status and prevention and control problems, we December 12, 1983 -21 days, in the outskirts of Zhengzhou City Garden District 1, 3