果树是多年生植物,年生长期也较长,各种虫相在长时间的环境中,都选择了适宜自己生存的条件,以便更好的安居下来,建立自己的群落,因此我们必须从果树管理的各个方面造成利于天敌的生存条件增加种群数量,恶化害虫的生活条件减少虫源。那么,冬季应当怎样保护害虫天敌呢?一、深翻改土。深翻改土是果树丰产的 Fruit trees are perennials, the annual growth period is longer, a variety of insect phase in a long time environment, have chosen their own conditions for survival, in order to better settle down and build their own community, so we have to manage from the fruit trees All aspects of the conditions conducive to the survival of natural enemies to increase the population, deteriorating the living conditions of pests to reduce the source of insects. So, how to protect pests and natural enemies in winter it? Deep conversion of soil is fruit trees yield