دورية
Persistence and Fate of 2,4‐D Butoxyethanol Ester in Artificial Ponds
| العنوان: | Persistence and Fate of 2,4‐D Butoxyethanol Ester in Artificial Ponds |
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| المؤلفون: | Birmingham, Brendan C., Colman, Brian |
| المصدر: | Journal of Environmental Quality; January 1985, Vol. 14 Issue: 1 p100-104, 5p |
| مستخلص: | A granular formulation of the butoxyethanol ester of 2,4‐dichlorophenoxyacetic acid (2,4‐D) was applied at a rate of 23 kg a.i. ha−1to outdoor, artificial, polythene‐lined ponds infested with Eurasian watermilfoil (Myriophyllum spicatumL.). Water temperature dropped from 25°C at time of treatment to 0°C after 56 d and the ponds were frozen over for the rest of the study. Samples of plant material, pond water, and sediment were taken over a 180‐d period, extracted, and analyzed by gas chromatography to determine residue concentrations of ester and 2,4‐D. Ester levels in water were low and dropped to < 1.0 µg L−1within 15 d. Ester concentration in sediment 7 d post application was 1.7 µg g dry wt−1, but dropped to 0.1 µg g dry wt−1after 42 d. 2,4‐Dichlorophenoxyacetic acid residues in water declined to 1.0 mg L−1after 85 d and to 0.2 mg L−1after 178 d. Residues in plant material dropped to 10 µg g dry wt−1after 70 d; sediment residues were negligible after 50 d. Residues of 2,4‐dichlorophenol or 2,4‐dichloroanisole were not detected in any samples. Despite the low temperature prevailing in the latter half of the study, a relatively rapid rate of 2,4‐D breakdown was maintained both in pond water and sediment. |
| قاعدة البيانات: | Supplemental Index |
| تدمد: | 00472425 15372537 |
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| DOI: | 10.2134/jeq1985.00472425001400010020x |