Review article

Bioassay methods for detecting herbicide residues in soil

Ana Pintar ; Sveučilište u Zagrebu Agronomski fakultet, Zavod za herbologiju
Zvonimir Ostojić ; Sveučilište u Zagrebu Agronomski fakultet, Zavod za herbologiju
Klara Barić ; Sveučilište u Zagrebu Agronomski fakultet, Zavod za herbologiju

Abstract

The use of soil‐applied herbicides aims to provide prolonged (residual) weed control during the vegetation season. Despite positive sides, residual herbicides have also negative effect, especially those that stay active in soil longer than one year. That kind of residual herbicides can be quite damaging for the next crop in the crop rotation. Time of decay of these herbicides in soil depends on its numerous biotic and abiotic factors that influences degradation and movement of active substances from the applied zone. Among the most important factors are physical and chemical properties of herbicides, properties of soil (content and the type of soil colloids, pH and present population of microorganism) and weather conditions (temperature and humidity). Those factors have direct or indirect affect on the herbicides, but mostly they are in interaction. If there is a suspicion that residue of some herbicides could damage next crop in the crop rotation, there are two ways to predict that danger, chemical analysis and bioassay method. Quantitative analysis includes chemical methods while bioassay presents measuring of biological response of plants on used/applied herbicides. Main advantages of bioassay are simplicity of use, reproducibility and low price. Besides that, the use of bioassay gives us reliable answer about herbicide residues that are available to the certain plant and if they could to cause phototoxicity.

Keywords

herbicides; residues; phytotoxicity; crop rotation; bioassay

Hrčak ID:

189209

URI

https://hrcak.srce.hr/189209

Publication date:

1.6.2017.

Article data in other languages: croatian

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