一、需要改变观念过去,古老的农业没有农药使用,尽管人们作了很大的努力,但作物病虫害仍会突然蔓延,造成饥荒。表面上看来,农药成了人类根除饥荒的救星。它提供了在防止作物受害时的迅速的治疗作用;使用上的灵活性;显然更简单、更实际的防治病虫害的方法,并且,用药技术上象使用化肥一样方便,用药时间的选择较为自由。然而,简单、卓效、广泛用途及暂时的经济效益等优点,其本身也引起了一系列的消极影响,例如:环境污染和农药在食物中的残 First, the need to change the concept In the past, the ancient agriculture is not pesticide use, despite the great efforts made, but crop diseases and pests will be a sudden spread, resulting in famine. On the surface, pesticides have become the savior of humanity to eradicate famine. It provides rapid healing in the event of crop damage; flexibility in use; apparently simpler and more practical methods of pest control; and, as far as the use of chemical fertilizers is concerned, the choice of treatment time is relatively free. However, the advantages of simplicity, efficiency, extensive use and temporary economic benefits have themselves caused a series of negative impacts such as environmental pollution and pesticide residue in food