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Behaviour of sulcotrione and mesotrione in two soils
Author(s) -
Chaabane Hanène,
Vulliet Emmanuelle,
Calvayrac Christophe,
Coste CamilleMichel,
Cooper JeanFrançois
Publication year - 2008
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.1456
Subject(s) - chemistry , soil water , environmental chemistry , sorption , adsorption , organic chemistry , environmental science , soil science
The behaviour of sulcotrione, a recently introduced triketone herbicide, in various soil types was studied under laboratory conditions. In particular, degradation and sorption processes were examined on Ghent and Perpignan soils. Kinetics showed that the degradation of sulcotrione was influenced by biotic and/or abiotic factors. Half‐lives ranged between 45 and 65 days. Among the degradation compounds identified were 1,3‐cyclohexanedione (CHD) and 2‐chloro‐4‐mesyl benzoic acid (CMBA), previously described as hydrolysis products, and, under special conditions, a derivative of phenylheptanoic acid (PHD). This new degradation product suggested that sulcotrione could follow two possible pathways in the soil, as in water. During the sorption study, a moderate retention of sulcotrione and CMBA relative to CHD and PHD, which were highly adsorbed whatever the soil type, was reported. Experiments carried out under the same conditions for sulcotrione and mesotrione, another triketone herbicide recommended in maize culture, made it possible to compare the two triketones and to conclude that they exhibited relatively similar behaviour in the soil, i.e. that their leaching potential needs to be properly addressed and risks evaluated. Copyright © 2007 Society of Chemical Industry