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| Publication Type:
| Refereed |
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| Author(s): | Carter, M.;
Bowhey, C.;
Lang, S.;
Charbonneau, P.;
Stephenson, G. R. |
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| Author Affiliation: | Carter, Bowhey, Lang, Stephenson: Department of Environmental Biology; Charbonneau: Guelph Turfgrass Institute, University of Guelph, Guelph, Ontario |
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| Title: | Persistence of 2,4-D, mecoprop, dicamba, chlorpyrifos, and chlorothalonil in composted turfgrass clippings |
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| Section: | Conservation and environment
Other records with the "Conservation and environment" Section
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| Meeting Info.: | Toronto, Ontario, Canada: July 2001 |
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| Source: | International Turfgrass Society Research Journal. Vol. 9, No. Part 1, 2001, p. 6-11. |
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| Publishing Information: | Oakville, Ontario, Canada: International Turfgrass Society |
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| # of Pages: | 6 |
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| Keywords: | TIC Keywords: Composting; Residual effects; Persistence; 2,4-D; Mecoprop; Dicamba; Chlorpyrifos; Chlorothalonil; Composts; Clippings; Herbicide residues; Insecticides; Fungicide residues; Residues; Residue persistence
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| Abstract/Contents: | "Three herbicides, 2,4-D[2,4-dichlorophenoxy acetic acid], mecoprop [2-(4-chloro-2-methylphenoxy) propanoic acid], dicamba [3,6-dichloro-2-methoxybenzoic acid], an insecticide, chlorpyrifos [O,O-diethyl O-(3,5,6-trichloro-2-pyridinyl) phosphorothioate], and a fungicide, chlorothalonil [2,4,5,6-tetrachloro-1,3-benzenedicarbonitrile] were examined for their persistence during the composting of treated turfgrass clippings mixed in a 60:40 ratio with tree leaves. When the homeowner sized composters (0.23m3) were loaded only once, one day after spraying, total dry weights of the compost and residues of 2,4-D, mecoprop and dicamba decreased by 52%, 86%, 80% and 74%, respectively over the 10 week composting period. Similarly, over a nine-week period, compost dry weights and residues of chlorpyrifos and chlorothalonil decreased by 67%, 89% and 99%, respectively. In a second, 'multiple-loaded' scenario, freshly treated clippings were diluted at weekly intervals with clippings harvested from the same plots. With this approach, none of the three herbicides were detectable in the composted mixture of 40 days when the clippings from the fifth mowing were added. Although still detectable, residues from chlorothalonil and chlorpyrifos were reduced by 99% during the 9 week period. The once-loaded compost made from clippings treated with 2,4-D + mecoprop + dicamba was still toxic to turnip seedlings after a 10 week period. In contrast, no phytotoxicity was observed with compost from the multiple-loaded system after only 4 weeks of composting." |
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| Language: | English |
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| References: | 10 |
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| See Also: | Other items relating to: COMFAT
Other items relating to: 2, 4 - D in Turf |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Carter, M., C. Bowhey, S. Lang, P. Charbonneau, and G. R. Stephenson. 2001. Persistence of 2,4-D, mecoprop, dicamba, chlorpyrifos, and chlorothalonil in composted turfgrass clippings. Int. Turfgrass Soc. Res. J. 9(Part 1):p. 6-11. |
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