随着作物管理水平的提高,人们对害虫治理提出了低成本、收益大、污染少、无不良后遗症等要求。把以夺取最高产量为目标转向了以夺取最大利益为目标,用生态平衡的整体观和经济观指导害虫治理工作,因此,害虫治理的经济阈值日益引起人们重视。所谓害虫治理的经济阈值是指造成“经济损失”的最低害虫密度,包含生物过程和经济过程两方面内容。在使用这个概念,特别是在制定害虫经济阈值时,会遇到许多问题,如:作物 With the improvement of crop management, people put forward the requirements of pest control at low cost, large benefit, less pollution and no adverse sequelae. The economic threshold of pest management has drawn increasing attention due to the goal of taking the highest yield to achieve the maximum benefit and the eco-balanced holistic concept and economic concept to guide pest management. The so-called economic threshold of pest management refers to the lowest pest density causing “economic loss”, covering both biological process and economic process. There are many problems in using this concept, especially in setting the pest economy threshold, such as crop