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作为综合防治的中心概念,通常使用的“经济受害水平”等是建立在经费与利益平衡关系上的一些概念,目前颇受重视。但从国内外报导的有关文献来看,内容不太一致,意义也不够明确。Stern等(1959)认为所谓经济受害水平(economic injury level)是指引起经济损害的害虫最低密度;而所谓经济阈值(economic threshold)或防治阈限(Control threshold)是指防止害虫密度
As the central concept of comprehensive prevention and control, the commonly used concepts such as “the level of economic victimization” are some concepts that are based on the balance between funds and interests and are now valued. However, according to the relevant literature reported at home and abroad, the content is not very consistent and the significance is not clear enough. Stern et al. (1959) argued that the so-called economic injury level is the lowest density of pests that cause economic damage. The so-called economic threshold or control threshold refers to the prevention of pest density