经济损害允许水平与经济阈限这两个名词及其所含的概念于1959年被提出,20多年来,在应用中得到不断地发展。在实际的害虫治理程序中,对于经济损害允许水平的研究和应用还是十分薄弱的。推究其原因,可能是由于(1)多数害虫治理研究的重点放在生态学和防治技术方面;(2)测定经济损害允许水平在方法上存在最大困难;(3) The two terms of permissible level of economic damage and economic threshold are introduced in 1959, and their concepts have been continuously developed in application for more than 20 years. In the actual pest management process, the research and application of the allowable level of economic damage is still very weak. The reasons for this may be due to (1) the majority of pest management studies are focused on ecology and control technologies; (2) the methodological approach is of the greatest difficulty in determining the allowable level of economic damage; (3)