The main purpose of plant protection from the economic point of view is to maintain the yielding potential of a given crop, determined by its biological properties, environmental conditions and agrotechnical conditions created by farmers. The goal is to reduce the occurrence of pests to a level where the costs of plant protection are lower than the losses caused by the pests and diseases of crops, or weeds.
The cost-effectiveness of chemical plant protection treatments is expressed by various indicators, including E and Q.
The E indicator is used to compare the value of the saved yield and the costs of the plant protection products used; it is the quotient of the value of the saved yield
and the costs of purchased plant protection products used for the control of pests in a given crop.
If the value of E is higher than 1, it means that treatments were cost-effective.
The Q indicator is used to estimate the cost of plant protection products versus the value of the produced yield; it determines the ratio of the costs of plant protection products to the value of the yield expressed in %.
If the value of Q is higher than 10%, it means that treatments are too costly compared to the value of the produced yield.
It has been estimated that crop pests in Poland (if not controlled) cause a 20–30% loss of yield.
In most typical cases, a 20% loss of yield is assumed when estimating the costs of purchased plant protection products.
The value of the yield and the value of losses of the analysed crops is calculated with consideration of direct payments (SAP; CAP; excise duty refund for fuel used in agriculture; sugar subsidy and other subsidies).
autor: mgr Tomasz Krasiński
Projekt realizowany w zadaniach 1.5
Programu Wieloletniego IOR-PIB na lata 2016 - 2020
Instytut Ochrony Roślin - Państwowy Instytut Badawczy
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