Persistence of fluazinam in soil under boreal conditions

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http://hdl.handle.net/10138/326896

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Hakala , K P , Yli-Halla , M J , Tuomainen , P M & Hartikainen , H 2020 , ' Persistence of fluazinam in soil under boreal conditions ' , Journal of Environmental Science and Health. Part B: Pesticides, Food Contaminants, and Agricultural Wastes , vol. 55 , no. 6 , pp. 539-549 . https://doi.org/10.1080/03601234.2020.1729631

Title: Persistence of fluazinam in soil under boreal conditions
Author: Hakala, Kati P.; Yli-Halla, Markku J.; Tuomainen, Paivi M.; Hartikainen, Helina
Contributor: University of Helsinki, Department of Agricultural Sciences
University of Helsinki, Department of Agricultural Sciences
University of Helsinki, Department of Food and Nutrition
University of Helsinki, Department of Agricultural Sciences
Date: 2020-06-02
Language: eng
Number of pages: 11
Belongs to series: Journal of Environmental Science and Health. Part B: Pesticides, Food Contaminants, and Agricultural Wastes
ISSN: 0360-1234
URI: http://hdl.handle.net/10138/326896
Abstract: Fluazinam, a widely used pesticide in conventional potato cultivation, is effective against epidemics of the fungal disease late blight. To assess fluazinam persistence in soil, laboratory experiments were conducted with fluazinam added to soil as a pure chemical or contained in the commercial product Shirlan (R). In a follow-up experiment, the persistence was monitored under constant temperature and water content conditions during a maximum period of 1 year. In an annual climatic rotation experiment, fluazinam added to soil was exposed to the year-round temperature and water content conditions occurring in the boreal zone. A third experiment was undertaken to clarify the effect of soil organic matter (SOM) on the recovery of fluazinam. In the follow-up and annual climatic rotation experiments, more than half of the added fluazinam was recovered after 1 year of incubation. The estimated half-life of fluazinam ranged between 355 and 833 days. The degradation of fluazinam was enhanced by an abundance of SOM, a warm temperature, and wetness. Additionally, in over half of soil samples collected from fields where potato had been intensively cultivated for many years, varying concentrations of fluazinam were detected. Fluazinam can carry over to the next growing season in professional potato production.
Subject: Pesticide
Shirlan (R)
degradation
potato late blight
high-performance liquid chromatography
ORGANIC-COMPOUNDS
SORPTION
FINLAND
POTATO
415 Other agricultural sciences
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