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Acta herbologica
2016, vol. 25, iss. 2, pp. 15-34
article language: Serbian
document type: Review Paper
published on: 08/02/2019
doi: 10.5937/ActaHerb1602015M
The application of mathematical models to calculate the yield loss of cultivated plants depending on the composition, number and timing of weed control
aUniversity of Banja Luka, Faculty of Agriculture, Republic of Srpska, B&H
bAkademija nauka i umjetnosti Republike Srpske, Banja Luka, Republika Srpska, Federacija BiH

Abstract

Program of Integrated Weed Management (IWM) involves a combination of different methods (agrotechnical, mechanical, biological, genetic and chemical) for efficient and eco­nomical weed control. Successful implementation of the concept of integrated weed control is not possible without knowledge about characteristics of weeds and crop, and weed emergence dynamics. The yield loss of cultivated plants depends of many factors, of which the most im­portant is crop density, the number of weeds and soil fertility. The dependence of yield loss can be explored through the understanding effects of one weed species and different weed species ('mixed infestation') to yield loss. Research can be empirical and mechanistic, and the results of these studies can be used to predict yield loss, at an acceptable level of accuracy through the use of mathematical models. It is important to determine which is the optimal time to remove weeds. One of the first steps in the conception of the integrated weed control is to identify the critical period for weed control (CPWC). Knowing of this period is used to make decisions about the need for control, time of control, and all depending on the specific crop. A critical period for weed control is defined as the time period between two stages of crop growth within which it is necessary to perform the weed control, in order to prevent yield loss greater than 5%.

Keywords

weeds; yield loss; critical period for weed control

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