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冬季消灭果树病虫害有很多有利条件:第一,害虫越冬场所比较集中,龄期一致,有利于集中消灭;第二,果树处在休眠期,抗药力较强,可以使用一些在生长期不能施用的高浓度农药;第三,果树全部落叶后,喷药容易均匀周到,而且比较省药;第四,从果树落叶到第二年发芽,前后有5个月,有比较充裕的时间进行防治。所以说冬季是防治病虫的好时机。主要措施是:
In winter, there are many favorable conditions for the elimination of pests and diseases in fruit trees. First, the overwintering habitats of pests are concentrated and the age is consistent, which is beneficial for the concentration and elimination. Second, the fruit trees are in dormancy period and have stronger resistance to the disease. High concentrations of pesticides; third, after all the deciduous trees, spray easily and thoughtfully, and more provincial; fourth, from the deciduous leaves to germinate the second year, before and after 5 months, there is plenty of time for prevention and treatment. So winter is a good time to prevent pests. The main measures are: