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我国在城市化迅速发展进程中，城市植被形成了园林化格局，城市环境质量明显改善，但也出现了城市中心衰退现象（高楼多绿地少），导致了环境植物病虫害的屡屡发生。大致归结如下：———城市园林绿化格局的大调整改变了原有的病虫害结构。随着近年来国外园林设计手法不断传入
In the process of rapid urbanization in our country, urban vegetation has formed a pattern of gardens and the quality of urban environment has been obviously improved. However, the decline of urban centers (less green buildings and tall buildings) has led to the frequent occurrence of pests and diseases of environmental plants. Generally concluded as follows: --- Urban landscape pattern of major changes have changed the original structure of pests and diseases. With the continuous introduction of foreign garden design techniques in recent years