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高效、低毒、经济、不污染环境是当前农药发展的趋势.近20多年来,人工合成了一系列类似除虫菊素化学结构的拟除虫菊酯类农药,它们不仅具有天然除虫菊素的高效、低毒、低残留特点,而且其缓分解的稳定性及杀虫毒力都大大超过了天然除虫菊,已经发展为一类新型杀虫剂.近期我省化工研究所除合成的敌虫菊酯,已广泛应用外,并以之与乐果配制成杀灭乐401;还将乐果研制成4%乐果颗粒剂.笔者为了测定上述药剂对分布普遍而又为害严重的蚜虫进行了试验.因为蚜虫多集中在嫩梢、嫩叶上为害,影响植物生长,且一年能发生多代,有的多达20多代,繁殖
Efficient, low toxicity, economy and non-polluting environment are the current trend of pesticide development.In recent twenty years, a series of pyrethroid pesticides with chemical structure similar to pyrethrin have been artificially synthesized, which not only have high efficiency and low toxicity of natural pyrethrin , Low residue characteristics, and its slow decomposition stability and insecticidal virulence greatly exceeded the natural pyrethrum, has developed into a new class of insecticides recently Chemical Research Institute in addition to our synthetic pyrethroid, has been widely Application, and with the dimethoate formulated to kill off music 401; also will be developed into dimethoate 4% dimethoate granules.In order to determine the distribution of these agents on the distribution of aphids and serious harm to a test because aphids and more Focus on young shoots, young leaves damage, affecting plant growth, and can occur for many generations a year, and some as many as 20 generations, breeding