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DOI: | 10.1002/ps.359 |
Web URL(s): | http://onlinelibrary.wiley.com/doi/10.1002/ps.359/full Last checked: 03/14/2014 Access conditions: Item is within a limited-access website http://onlinelibrary.wiley.com/doi/10.1002/ps.359/pdf Last checked: 03/14/2014 Requires: PDF Reader Access conditions: Item is within a limited-access website http://onlinelibrary.wiley.com/enhanced/doi/10.1002/ps.359/ Last checked: 03/14/2014 Access conditions: Item is within a limited-access website Notes: Enhanced HTML version |
Publication Type:
| Refereed |
Author(s): | Hermosin, M. Carmen;
Calderón, M. Jesús;
Aguer, Jean-Pierre;
Cornejo, Juan |
Author Affiliation: | Hermosin, Calderón, and Cornejo: Instituto de Recursos Naturales y Agrobiologia de Sevilla, Sevilla, Spain; and Aguer: Laboratoire de Photochimie, UMR Université Blaise-Pascal-CNRS, Aubier Cedex, France |
Title: | Organoclays for controlled release of the herbicide fenuron |
Section: | Papers Other records with the "Papers" Section
|
Source: | Pest Management Science. Vol. 57, No. 9, September 2001, p. 803-809. |
Publishing Information: | London : for the Society of Chemical Industry by John Wiley & Sons |
# of Pages: | 7 |
Related Web URL: | http://onlinelibrary.wiley.com/doi/10.1002/ps.359/abstract Last checked: 03/14/2014 Notes: Abstract only |
Keywords: | TIC Keywords: Fenuron; Controlled release herbicides; Sorption; Water quality; Surface runoff; Leaching; Water pollution; Soil water relations
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Abstract/Contents: | "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 a 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 gAIkg-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 release 50% of the fenuron content) ranging from 0.3min to 2400h. 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 (6μM) or a quarter (3μM) of that obtained from the free technical compound (12μM). 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 gAIkg-1) have 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." |
Language: | English |
References: | 33 |
Note: | Figures Tables Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Hermosin, M. C., M. J. Calderón, J.-P. Aguer, and J. Cornejo. 2001. Organoclays for controlled release of the herbicide fenuron. Pest Manage. Sci. 57(9):p. 803-809. |
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| DOI: 10.1002/ps.359 |
| Web URL(s): http://onlinelibrary.wiley.com/doi/10.1002/ps.359/full Last checked: 03/14/2014 Access conditions: Item is within a limited-access website http://onlinelibrary.wiley.com/doi/10.1002/ps.359/pdf Last checked: 03/14/2014 Requires: PDF Reader Access conditions: Item is within a limited-access website http://onlinelibrary.wiley.com/enhanced/doi/10.1002/ps.359/ Last checked: 03/14/2014 Access conditions: Item is within a limited-access website Notes: Enhanced HTML version |
| MSU catalog number: SB 951 .A1 P45 |
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