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一、深翻树盘。随着气温的下降,许多害虫钻进土壤、杂草、枯枝落叶中以蛹、幼虫、卵的形式越冬。如枣尺蠖以蛹在树冠下土壤深10—20cm处越冬。桃小食心虫、核桃举肢蛾、扉刺蛾以老熟幼虫在土壤中结茧越冬。山楂红蜘蛛、梨网蝽以成虫在落叶、杂草、树干翘皮、土缝等处越冬。许多病菌也以各种形式在病叶、病蒂上越冬。如柿园斑病、柿角斑病、枣锈病、白粉病、苹果、梨锈病、梨黑星病、核桃细菌性黑斑病等。因此,要在土壤封冻前,把树盘深翻30—40cm,并将杂草、枯枝落叶、果深埋或集中焚烧。这样可将落叶杂草、土壤中越冬的病虫、蛹、卵及各种病菌消灭,减少翌年危害。
First, the deep turning tree plate. As the temperature drops, many pests crawl into the soil, weeds, litter in the form of pupae, larvae and eggs overwintering. Such as jujube 蠖 pupae in the soil under the tree crown 10-20cm deep winter. Peach small heart worms, walnut lifted moths, moth larvae cocoon overwintering in the soil with mature larvae. Hawthorn red spider, pear stink bug to adults in the leaves, weeds, trunk bark, soil seams, etc. overwintering. Many germs also take various forms in the diseased leaves, sick pedis winter. Such as persimmon Park spot, persimmon Kokashu, date rust, powdery mildew, apple, pear rust, pear scab, walnut bacterial black spot. Therefore, in the soil before freezing, the tree deep 30-40cm, and weeds, litter, fruit, deep or concentrated burning. This will be deciduous weeds, soil overwintering pests, pupae, eggs and a variety of germs to eliminate, reduce the following year’s harm.