Neconomic injury level and economic threshold pdf

The the damage boundary is the lowest level of injury that can be measured figure 2. New formulas that consider expanded concepts of the economicinjury level and economic threshold permit calculation of multiple levels at a given time, dynamic levels that change over time, and multidimensional levels that consist of the densities of more than one life stage or species. Economic threshold and economic injury levels for the two. Economic thresholds and economic injury levels radcliffes ipm. This is in order to gather information for sustainable. Economic thresholds and economic injury levels radcliffe. Similarly, the economic injury level will be lower for insect species that cause a greater amount of feeding damage per individual i in the formula, or for varieties that are more sensitive to this injury and suffer more economic damage d per unit injury. Pdf economic threshold and economic injury levels for. Acari, spider mite, tetranychus cucurbitacearum, damage, economic threshold, injury level.

Insect economic levels in relation to crop production. Download scientific diagram showing economic injury level eil and economic threshold level etl of pests of tea from publication. Levels of economic insect damage and their effects on crop production are the most. Plantbased economic injury level for assessing economic. One of the fundamental concepts of integrated pest management is that each pest species has a definable relationship in terms of damage to the plant or animal host that it attacks.

Date palm pests and diseases integrated management guide. Field evaluation of synthetic and neemderived alternative. In integrated pest management, the economic threshold is the density of a pest at which a control treatment will provide an economic return. How to calculate the economic injury level eil and. Although the economic injury level eil and the economic threshold et are fundamental integrated pest management ipm concepts, they are often confused. Expressed in terms of yield, economic loss is reached at the gain threshold, and the gain threshold is beyond the damage boundary. Employing action thresholds ats can reduce pesticide whether synthetic or botanical.

One such decisionmaking tool is the economic injury level eil, the lowest pest density. The economic injury level has been defined as the lowest pest population density that will cause economic damage. This relationship is often referred to as the damage curve fig. Economic injury level eil and economic threshold et concepts in pest management. Similarly, the economic injury level will be lower for insect species that cause a greater amount of feeding damage per individual i in the formula. They are economic damage, economic injury level, and economic threshold. These values represent a threshold that is in reasonable limits to. The economic injury level and the economic threshold in ipm. The economic injury level eil concept integrates economics and biology. The pest density at which management action should be taken to prevent an increasing pest population from reaching the economic injury level. Economic injury level eil and economic threshold et. Showing economic injury level eil and economic threshold level.

Stochastic modeling of economic injury levels with respect to yearly. The smallest number of insects amount of injury that will cause yield losses equal to the insect management costs. The best way to calculate the economic injury level eil and economic threshold et of fall armyworm, spodoptera frugiperda on maize. The economic injury level is the pest population density that will result in economic damage.