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Bioassay to Detect MON-37500 and Triasulfuron Residues in Soils

Published online by Cambridge University Press:  20 January 2017

Eva Hernández-Sevillano ,
Mercedes Villarroya ,
José L. Alonso-Prados  and
José M. García-Baudín
Eva Hernández-Sevillano
Affiliation:
Department. Departamento de Protección Vegetal, INIA, Carretera de La Coruña km. 7.5, 28040 Madrid, Spain
Mercedes Villarroya
Affiliation:
Department. Departamento de Protección Vegetal, INIA, Carretera de La Coruña km. 7.5, 28040 Madrid, Spain
José L. Alonso-Prados
Affiliation:
Department. Departamento de Protección Vegetal, INIA, Carretera de La Coruña km. 7.5, 28040 Madrid, Spain
José M. García-Baudín*
Affiliation:
Department. Departamento de Protección Vegetal, INIA, Carretera de La Coruña km. 7.5, 28040 Madrid, Spain
*
Corresponding author's E-mail: [email protected].
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Abstract

Sulfonylurea herbicide residues in soil can affect rotational crops even at low concentrations. Although analytical methods are efficient enough to measure them, the lack of an efficient herbicide extraction technique makes bioassays useful for determining the presence of phytotoxic levels of sulfonylurea residues in soil. A growth chamber bioassay using sunflower was developed to detect MON-37500 and triasulfuron residues in two different soils. Root length was measured 15 d after the treatment. A sigmoid equation described plant root length response as a function of herbicide concentration. The nonlinear regression established a range of I50 values from 0.9 to 2.9 ppb ai for both sulfonylureas.

Keywords

MON-37500 (proposed common name, sulfosulfuron), 1-(4,6-dimethoxypyrimidin-2-yl)-3-[(2-ethanesulfonyl-imidazo[1,2-a]pyridine)sulfonyl]ureatriasulfuronsunflower, Helianthus annuus L. ‘Albani’Dose–response curvesI50phytotoxicityrotational cropssulfonylurea herbicidesI20, dose required for 20% inhibitionI50, dose required for 50% inhibitionOM, organic matter
Type
Research
Information
Weed Technology , Volume 15 , Issue 3 , September 2001 , pp. 447 - 452
Copyright
Copyright © Weed Science Society of America 

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