果树的病、虫,常年生活于果园中,绝大部分在树上或树下的土壤里越冬,年复一年地繁殖为害。因此,抓住病虫越冬的时机,贯彻“预防为主,综合防治”的方针,大力开展果园冬季病虫防治工作,对减少果园中病虫源,具有十分重要的意义。现就苹果园冬季防治中行之有效的几项措施,介绍如下: 一、清扫落叶苹果叶是病虫为害和越冬的主要部位之一。如山东、河南、江苏、安徽、陕西、云南、贵州和四川等省的苹果产区,常年遭受苹果褐斑 Fruit trees, insects, perennial living in orchards, the vast majority of trees in the soil or under the trees in winter, year after year breeding. Therefore, it is of great significance to seize the opportunity of pests and winters to carry through the principle of “prevention first and comprehensive prevention and control” to vigorously carry out prevention and control of pests and diseases in orchards in winter. Now on the apple orchard in winter prevention and effective in several measures, described as follows: First, cleaning the leaves of apple leaves pest infestation and overwintering one of the main parts. Such as Shandong, Henan, Jiangsu, Anhui, Shaanxi, Yunnan, Guizhou and Sichuan provinces apple-producing areas, perennial suffered apple brown spots