
Economical basis of IPM - Economic Thresholds | PPT - SlideShare
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. …
Categories, Causes for outbreak of pests.ppt - SlideShare
2023年12月27日 · The document discusses key concepts in integrated pest management (IPM) theory including the economic injury level (EIL), economic threshold (ET), and tolerance levels. …
《害虫综合治理》第三章 害虫综合治理的经济学原理.ppt
2017年10月21日 · eil和et的关系: (1)如果防治措施效果较慢(包括一些药效迟缓的杀虫剂),即不能马上杀死害虫,必须在eil之前确定一个阈值(et),以防止在防治措施起作用时, …
经济损失允许水平EIL.ppt 61页 - 原创力文档
eil和et的关系: (1)如果防治措施效果较慢(包括一些药效迟缓的杀虫剂),即马上杀死害虫,必须在eil之前确定一个阈值(et),以防止在防治措施起作用时,害虫种群密度超过eil;如 …
第三章害虫综合治理的经济学原理-PPT文档资料_百度文库
一、经济损失允许水平(eil)的概念 • 1、1959有人提出eil是指:引起经济损失的害虫最低密度。所 谓经济损失是指防治费用与用于防治挽回损失金额的差值。 • 2、eil另一种定义:由防治措 …
三章节害虫综合治理经济学原理知识讲解(61页)-原创力文档
2019年11月30日 · eil和et的关系: (1)如果防治措施效果较慢(包括一些药效迟缓的杀虫剂),即马上杀死害虫,必须在eil之前确定一个阈值(et),以防止在防治措施起作用时,害虫 …
ECONOMIC INJURY LEVEL CONCEPT - ppt download - SlidePlayer
8 The economic injury level (EIL) is often expressed mathematically by the formula: SO EIL 320 INSECTS PER ACRE "C" is the unit cost of controlling the pest (e.g., $20/acre) "N" is the …
prevent an increasing pest population from reaching Economic Injury Level (EIL) - ETL represents pest density lower than EIL to allow time for initiation of control measure
EIL. A simple, robust model of the EIL relationship between pest control costs and benefits from control actions was developed by Pedigo et al. as: EIL = C/VDIK where C = management cost …
EIL and ETL | Principles of Integrated Disease Management
The Economic Injury Level (EIL) is a dynamic and important concept in Integrated Disease Management (IDM) and Integrated Pest Management (IPM). By calculating the EIL, farmers …