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1.药剂选择 许多药剂对害虫都有选择性,而害虫对某些药剂又具有抗药性,用药不当会直接影响防治效果。各地应针对果园不同害虫选用不同的具有内吸传导性的药剂。如蚜灭多适于防治苹果绵蚜,氧化乐果适于防治苹果黄蚜、葡萄二星叶蝉等害虫,而杏蚜、桃蚜、桃一点叶蝉用桃蚜一次净防治较佳,但桃蚜花前防治宜用甲胺磷,久效磷则对柿绵蚧有特效。
1. Pharmacy Many pesticides are selective for pests, and pests for some drugs have resistance, improper medication will directly affect the control effect. Different places should be directed at different pests in the orchard with different drugs with internal absorption conductivity. Such as aphid off more suitable for control of cotton aphid apple, omethoate is suitable for the prevention and treatment of apple aphid, grape two leafhopper and other pests, and apricot aphid, peach aphid, peach aphid peach a net control better, but peach Aphid should be used before the prevention and treatment of methamidophos, monocrotophos has a specific effect on persimmon meq.