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过去防治蚜虫采用乐果药剂,无论是喷粉或喷雾都追求“一扫光”,这样在杀死蚜虫的同时,也大量杀伤了蚜虫的天敌。实行间隔施药,放宽了防治指标,保护了天敌,对压缩用药量,减少用药面积,维持生态平衡有显著作用。具体做法:当大豆蚜虫发生初盛期,优势种天敌处于易转移的成虫态时施药为宜。这样施药带的天敌能转移到保护带地里去,有效地控制保护带的蚜虫为害。经试验,保护带以10垄为宜,施药带的施药方法采用乐果毒砂摅施,
In the past, the prevention and treatment of aphids using dimethoate medicament, whether it is dusting or spraying, pursues “sweeping away light”, thus killing aphids and killing large numbers of natural enemies of aphids. The implementation of interval spraying, to relax the control indicators, protecting the natural enemies, the compression of medication, reduce the medication area, maintain a significant ecological balance. Specific approach: When soybean aphids occur early, the predominant species of natural enemies in the easy-to-transfer state of adult application is appropriate. The natural enemies of such pesticides can be transferred to the protective belt to effectively control the protective belt of aphids. After testing, the protection zone with 10 ridge is appropriate, the application of the drug delivery method using dimethoate Xuan Shi,