Use of Toxkit microbiotests in the determination of pesticide toxicity in soil and groundwater
2002
Dubova, L. (Latvia Univ. of Agriculture, Jelgava (Latvia)) | Zarina, D. | Grube, M.
Standardised Toxkit microbiotests were used in this work for herbicide toxicity assessment of soil and drainwater of experimental fields. The presence of pesticides in soil was determined also by infrared spectroscopy. Microbiotests were performed with the following test species: micro algae (Selenastrum capricornutum), protozoa (Tetrahymena thermophila), crustaceans (Daphnia magna and Thamnocephalus platyurus), and rotifers (Brachionus calyciflorus). The results showed different sensitivity of the microbioindicators to herbicide solutions and also to soil water extracts. The tested pesticides and their metabolites were present in the soil and possibly stimulated growth of algae. Infrared spectra of pesticides showed the most intensive absorption bands in each preparation, which could be used as characteristic absorption bands in assessment.
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