Organoclays for controlled release of the herbicide fenuron
7 pages, 4 tables, 5 figures, 33 references. Thanks are also due to anonymous referees for their comments to improve this paper.
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| Format: | artículo biblioteca |
| Language: | English |
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Wiley-Blackwell
2001-09
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| Subjects: | Controlled release, Fenuron, Formulation, Herbicides, Organoclay, Pesticide pollution control, Soil protection, Run-off, Leaching, Water quality, Water protection, |
| Online Access: | http://hdl.handle.net/10261/46025 |
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dig-irnas-es-10261-460252016-02-17T09:36:08Z Organoclays for controlled release of the herbicide fenuron Hermosín, M.C. Calderón, M.J. Aguer, J. P. Cornejo, J. Ministerio de Educación y Ciencia (España) Controlled release Fenuron Formulation Herbicides Organoclay Pesticide pollution control Soil protection Run-off Leaching Water quality Water protection 7 pages, 4 tables, 5 figures, 33 references. Thanks are also due to anonymous referees for their comments to improve this paper. Organoclays were assayed as matrices in which to associate herbicides, with the aim of decreasing product losses that could give rise to water contamination from agricultural activities. Fenuron was selected as model of a very mobile and highly water-soluble herbicide. Two different organoclays of high (A-HDT) and low (H-C18) reversible fenuron sorption were selected. Herbicide–organoclay complexes were prepared from the two organoclays and with two different fenuron contents (20 and 40 g AI kg−1) and two different mixing times, so as to form a series of weak and strong complexes. The release of fenuron from those complexes into water and water/soil suspensions gave values of T50 (time to release 50% of the fenuron content) ranging from 0.3 min to 2400 h. The total fenuron released in these closed systems ranged from 48 to 80% of the fenuron in the complex. The organoclay type (high or low sorptivity) had the greatest influence on fenuron release, followed by the strong or weak complex, suggesting that herbicide–organoclay interactions are the main factors controlling release. Soil column leaching experiments showed fenuron–organoclay complexes to be effective in reducing the peak herbicide concentration in the leachate to a half (6 µM) or a quarter (3 µM) of that obtained from the free technical compound (12 µM). Herbicide lost through leaching was reduced from 78% for the free technical fenuron to 50–30%, depending on the organoclay used as carrier and the strength of the complex. Bioassay with ryegrass showed that the weak fenuron/H-C18 complex (40 g AI kg−1) gave the same herbicidal activity as technical fenuron. The potential suitability of low-sorptive organoclays for conferring slow-release properties on the fenuron complex has been demonstrated CICYT through project AMB96-0445-CO2-01, from PAI through RNM-124 and from MEC by HF-1999-07 Peer reviewed 2012-02-21T15:21:23Z 2012-02-21T15:21:23Z 2001-09 artículo http://purl.org/coar/resource_type/c_6501 Pest Management Science 57(9): 803-809 (2001) 1526-498X http://hdl.handle.net/10261/46025 10.1002/ps.359 en http://onlinelibrary.wiley.com/doi/10.1002/ps.359/full none Wiley-Blackwell |
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biblioteca |
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Biblioteca del IRNAS España |
| language |
English |
| topic |
Controlled release Fenuron Formulation Herbicides Organoclay Pesticide pollution control Soil protection Run-off Leaching Water quality Water protection Controlled release Fenuron Formulation Herbicides Organoclay Pesticide pollution control Soil protection Run-off Leaching Water quality Water protection |
| spellingShingle |
Controlled release Fenuron Formulation Herbicides Organoclay Pesticide pollution control Soil protection Run-off Leaching Water quality Water protection Controlled release Fenuron Formulation Herbicides Organoclay Pesticide pollution control Soil protection Run-off Leaching Water quality Water protection Hermosín, M.C. Calderón, M.J. Aguer, J. P. Cornejo, J. Organoclays for controlled release of the herbicide fenuron |
| description |
7 pages, 4 tables, 5 figures, 33 references. Thanks are also due to anonymous referees for their comments to improve this paper. |
| author2 |
Ministerio de Educación y Ciencia (España) |
| author_facet |
Ministerio de Educación y Ciencia (España) Hermosín, M.C. Calderón, M.J. Aguer, J. P. Cornejo, J. |
| format |
artículo |
| topic_facet |
Controlled release Fenuron Formulation Herbicides Organoclay Pesticide pollution control Soil protection Run-off Leaching Water quality Water protection |
| author |
Hermosín, M.C. Calderón, M.J. Aguer, J. P. Cornejo, J. |
| author_sort |
Hermosín, M.C. |
| title |
Organoclays for controlled release of the herbicide fenuron |
| title_short |
Organoclays for controlled release of the herbicide fenuron |
| title_full |
Organoclays for controlled release of the herbicide fenuron |
| title_fullStr |
Organoclays for controlled release of the herbicide fenuron |
| title_full_unstemmed |
Organoclays for controlled release of the herbicide fenuron |
| title_sort |
organoclays for controlled release of the herbicide fenuron |
| publisher |
Wiley-Blackwell |
| publishDate |
2001-09 |
| url |
http://hdl.handle.net/10261/46025 |
| work_keys_str_mv |
AT hermosinmc organoclaysforcontrolledreleaseoftheherbicidefenuron AT calderonmj organoclaysforcontrolledreleaseoftheherbicidefenuron AT aguerjp organoclaysforcontrolledreleaseoftheherbicidefenuron AT cornejoj organoclaysforcontrolledreleaseoftheherbicidefenuron |
| _version_ |
1777664239013462016 |