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化学农药的“扰乱”作用是指化学农药对农田生态体系中生物群落生态平衡的“扰乱”。这种“扰乱”的直接结果是造成害虫再增猖獗现象的发生。这种现象很早就被人们所认识,据Ripper(1956)统计,全世界已有50余种害虫发生再增猖獗。在大多数报导中,作者们都认为这种现象是滥用化学农药杀伤害虫天敌的结果。 1979年晚稻期间,我们在广西贵县八圹公社对害虫和天敌的系统调查中,也发现化学农药的这种“扰乱”作用。
The “disruptive” effect of chemical pesticides refers to the “disruption” of chemical pesticides on the ecological balance of biological communities in agroecosystem. This direct result of “disruption” is the result of the rampant increase of pests. This phenomenon has long been recognized by people. According to Ripper (1956), more than 50 species of pests have risen again in the world. In most reports, the authors consider this phenomenon as a result of abuse of chemical pesticides to kill pests and natural enemies. During late 1979, during the systematic investigation of pests and natural enemies in the Banyan commune of Guixian County in Guangxi Province, we also found this “disruptive” effect of chemical pesticides.