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Sulcotrione versus atrazine transport and degradation in soil columns
Author(s) -
Cherrier Richard,
Boivin Arnaud,
PerrinGanier Corinne,
Schiavon Michel
Publication year - 2005
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.1105
Subject(s) - atrazine , chemistry , loam , environmental chemistry , soil contamination , soil water , pesticide , agronomy , environmental science , soil science , biology
A soil column experiment under outdoor conditions was performed to monitor the fate of 14 C‐ring‐labelled sulcotrione, 2‐(2‐chloro‐4‐mesylbenzoyl)cyclohexane‐1,3‐dione and atrazine, 6‐chloro‐ N 2 ‐ethyl‐ N 4 ‐isopropyl‐1,3,5‐triazine‐2,4‐diamine, in water leachates and in the ploughed horizon of a sandy loam soil. Two months after treatment, the cumulative amounts of herbicide residues leached from the soil were 14.5% and 7% of the applied radioactivity for sulcotrione and atrazine, respectively. Maximum leachate concentrations for each herbicide were observed during the first month following application: 120 and 95 µg litre −1 for sulcotrione and atrazine respectively. After 2 weeks, 78% of the sulcotrione and atrazine was extractable from the soil, whereas after two months only 10 and 4%, respectively, could be extracted. The maximum sulcotrione content in the first 10 cm of soil was identical with that of atrazine. For both molecules, the content of non‐extractable residues was low, being around 15%. Sulcotrione seems to be more mobile than atrazine but the consequences for water contamination are similar since lower doses are used. Copyright © 2005 Society of Chemical Industry