果园虫害防治在于准时和简化。一年中使用农药次数过多,不但浪费人力,也因害虫抗性增强,效果降低。崂山县沙子口公社董家埠大队果业队几年来采用打“封闭”药,收到了良好的防治效果。方法:春分前后(视气温回升情况而定)在全国范围对梨树喷一次700倍马拉硫磷乳剂(一周后结合喷5°Be石硫合剂效果更佳),可以有效防治梨大、梨小、螨类、蚜 Orchard pest control lies in punctuality and simplification. The excessive use of pesticides in one year not only wastes manpower but also increases pest resistance and reduces the effect. Laoshan Shazikou commune Dongjiabu brigade fruit industry team for several years to play playing “closed” medicine, received a good control effect. Methods: Before and after the vernal equinox (depending on the temperature rise), spraying a 700-fold marathion emulsion (a week later combined with spraying 5 ° Be lime-sulfur mixture) is more effective in controlling pear and pear Small, mites, aphids