随着科学技术革命强有力地把整个自然资源都吸引到物质生产的范围之中,同时也提出了防止环境污染的一系列最迫切的问题。当防治植物害虫时,不可能按照理想只对具有生活能力的害虫施用药物。人们只能把药物撒在整个害虫的栖息地点,而且采用任何方法都不可能使杀虫剂的施放和循环范围局限在树冠部分。例如,根据研究小组的 With the revolution in science and technology strongly bringing the entire natural resources into the scope of material production, a series of the most urgent problems for preventing environmental pollution have also been put forward. When controlling plant pests, it is not possible to administer the drug to only viable pests as desired. One can only sprinkle the drug over the entire habitat of the pest, and neither approach can limit the extent of pesticide application and circulation to the crown. For example, according to the research team