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- Title
Relative persistence of di- and tri-chlorophenoxyalkanoic acid herbicides in Saskatchewan soils.
- Authors
Smith, Allan E.
- Abstract
The persistence of 2,4-D, 2,4-DB, dichlorprop, 2,4,5-T, and fenoprop at the 2 ppm level was studied in the laboratory on three prairie soils at 85% of field capacity and 20°C. Following extraction of the soils with aqueous acetonitrile containing acetic acid, the herbicidal acids remaining were analysed gas chromatographically. Breakdown was rapid on all soils and the average half-lives for 2,4-D, 2,4-DB, dichloroprop, 2,4,5-T, and fenoprop were <7, <7, 10, 12, and 12 days respectively. Degradation on air-dried soils (15% of field capacity) was negligible with over 85% of the applied herbicides being recoverable after incubation periods during which the herbicides remaining in the moist soils accounted for less than 30% of the original treatments.
- Subjects
PRAIRIES; SOILS; ACETONITRILE; HERBICIDES; ACETIC acid
- Publication
Weed Research, 1978, Vol 18, Issue 5, p275
- ISSN
0043-1737
- Publication type
Article
- DOI
10.1111/j.1365-3180.1978.tb01160.x