2020年3月3日 · The document discusses key concepts in integrated pest management (IPM) theory including the economic injury level (EIL), economic threshold (ET), and tolerance levels. The EIL is the pest density that causes economic damage equal to the cost of control. The ET is slightly below the EIL to allow time for control actions before losses reach the EIL.

2023年12月27日 · The EIL is the pest density that causes economic damage equal to the cost of control. The ET is slightly below the EIL to allow time for control actions before losses reach the EIL. Periodic scouting is needed to determine pest densities and understand pest-damage relationships in order to establish appropriate control thresholds.

经济损失允许水平EIL.ppt,害虫防治作为一项农作物保护措施，也可以通过定性的研究和定量的分析、计算，评价其经济效果。以此为依据制定出来的治理方案才有科学依据，才能做到技术上先进，经济上合理。 主要内容 第一节 作物受害损失估计与预测 第二节 经济损失允许水平和经济与阈值 …

2017年10月21日 · 《害虫综合治理》第三章 害虫综合治理的经济学原理.ppt,4、Headley(1972年）EIL定义： EIL：边界防治成本函数等于边界产值函数时的害虫种群密度，即防治措施引起的产品价值增量与防治费用增量相等时，与之对应的害虫密度M即为EIL，可获得最大净收益。 5、其它有关EIL的概念 深谷昌次等(1973)认为，E

第三章害虫综合治理的经济学原理-ppt文档资料-第三章害虫综合治理的经济学原理-ppt文档资料 ... eil和et它们是ipm决策系统的重要组成部分， 所以它们在害虫综合治理中占有重要地位，而且越来越 受到人们的重视，并被广泛用于病虫草害治理的研究和 实践，特别 ...

经济损害水平EIL 经济阈值ET 平衡位置EP 三者间的关系 意义 锐普PPT论坛chinakui分享：www.rapidbbs.cn • 从EIL的定义可知: • 1当害虫种群密度<EIL时, 防治费用将大于由 于防治而挽回的损失, 防治的结果是得不偿失 。 • 张晓升 • 植保1001பைடு நூலகம் 1 经济 ...

The Economic Injury Level (EIL) is a critical concept in Integrated Pest Management (IPM) and Integrated Disease Management (IDM) that helps farmers make informed decisions regarding the need for pest or disease control. EIL is the pest population level at which the expected crop damage exceeds the cost of implementing control measures.

2023年10月26日 · Understand the definition of Environmental Impairment and how EIL insurance can protect you from liabilities and cleanup costs. Examples of potential claims and the importance of having EIL coverage. Learn about risk reduction options and how to use EIL coverage as a marketing tool.

2022年4月16日 · The document discusses key concepts in integrated pest management (IPM) theory including the economic injury level (EIL), economic threshold (ET), and tolerance levels. The EIL is the pest density that causes economic damage equal to the cost of control. The ET is slightly below the EIL to allow time for control actions before losses reach the EIL.

2019年11月7日 · ENGLISH AS A FOREIGN, SECOND, AND INTERNATIONAL LANGUAGE (EFL, ESL, EIL) IndawanSyahri. FUNCTIONS OF ENGLISH IN NON-NATIVE COUNTRIES • English as a Second Language (ESL) • English as a Foreign Language (EFL) • English as an International Language (EIL). GEBHARD (2000:2-3): EFL VS ESL • EFL is English as studied by people who live in places where English is not the first language of the ...