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严寒的冬季,危害果树的许多害虫,不食不动,处于休眠状态;危害果树的许多病害,都以“菌丝”“菌核”形式,进入越冬状态。利用冬闲时间,抓紧果树病虫害的防治,对减轻翌年病虫害的防治、发生危害有明显效果。 冬季防治果树病虫的优点是:①病虫害越冬场所集中,各种害虫,虫态一致,龄期一致,便于防治。②果树处于休眠状态,抗药力大大增强,不产生药害。③农药可以使用高浓度,以提高防治效果。④冬闲,可进行技术培训,现场练
In the cold winter, many pests that endanger the fruit trees can not eat without action and are in a dormant state. Many diseases that endanger the fruit trees enter the wintering state in the form of “mycelium” and “sclerotia.” The use of winter leisure time, pay close attention to the prevention and control of pests and diseases of fruit trees, mitigation of pests and diseases the following year, the occurrence of harm has a significant effect. Winter pest control fruit trees are: ① pests and diseases concentrated in the winter, a variety of pests, the same state of insects, the same age, easy to control. ② fruit trees in a dormant state, resistance greatly enhanced, does not produce injury. ③ pesticides can use high concentrations, in order to improve the control effect. ④ winter leisure, technical training can be carried out, on-site training