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Título: | Sulfosulfuron incorporated in micelles adsorbed on montmorillonite for slow release formulations |
Autor: | Mishael, Y. G.; Undabeytia López, Tomás CSIC ORCID ; Rabinovitz, U.; Rubin, Baruch; Nir, Shlomo | Fecha de publicación: | 2003 | Editor: | American Chemical Society | Citación: | Journal of Agricultural and Food Chemistry 51(8): 2253-2259 (2003) | Resumen: | Slow release formulations of the anionic herbicide sulfosulfuron (SFS) were prepared by incorporating it in micelles of an organic cation octadecyltrimethylammonium, which adsorb on the clay-mineral montmorillonite. The fraction of SFS adsorbed on the micelle-clay complex reached 98%, whereas for monomer-clay complexes, its adsorption was insignificant. Fluorescence studies showed surface contact between the micelles and the clay surface. The rate of SFS release from the micelle-clay formulations in aqueous suspensions was slow (<1%, 72 h). Spraying SFS formulations on a thin soil layer in a funnel, followed by irrigations (50 mm), resulted in complete elution of SFS from the commercial formulation (dispersible granular) versus 4% from the micelle-clay formulation. A plant bioassay in Rehovot soil showed that these respective formulations yielded 23 and 65% of shoot growth inhibition of foxtail. Consequently, the slow release micelle-clay formulations of SFS yield significantly reduced leaching and enhanced biological activity, thus providing environmental and agricultural advantages. | URI: | http://hdl.handle.net/10261/66009 | DOI: | 10.1021/jf0261497 | Identificadores: | doi: 10.1021/jf0261497 issn: 0021-8561 e-issn: 1520-5118 |
Aparece en las colecciones: | (IRNAS) Artículos |
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Sulfosulfuron incorporated in micelles adsorbed.pdf | 296,52 kB | Adobe PDF | Visualizar/Abrir |
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