Leaching of atrazine and hexazinone from <i>Abies nordmanniana</i> (Steven) spach plantations

Felding, Gitte

doi:10.1002/ps.2780350312

Cited by 17 publications

(3 citation statements)

References 9 publications

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“…In this work, we have investigated the potential use of clays, unaltered and modified by the incorporation of alkylammonium cations in the interlayers, as carriers for CR of the herbicide hexazinone ( Figure ), which has a very high leaching potential due to its high water solubility (33 g kg -1 ), low adsorption by soil components, and relatively long persistence in soil ( − ). First, we determined hexazinone adsorption by two montmorillonites saturated with different inorganic and organic cations and selected two clays displaying high adsorption capacities for hexazinone: Fe 3+ -saturated Wyoming montmorillonite (Fe-SW) and hexadecyltrimethylammonium-saturated Arizona montmorillonite (HDTMA-SA).…”

Section: Introductionmentioning

confidence: 99%

Inorganic and Organic Clays as Carriers for Controlled Release of the Herbicide Hexazinone

Celis

Hermosı́n

Carrizosa

et al. 2002

J. Agric. Food Chem.

118

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The risk of ground water contamination resulting from rapid leaching of highly soluble pesticides can be minimized through the application of the pesticide adsorbed on a matrix or carrier, which limits the amount of pesticide immediately available for undesirable losses. The use of natural materials for this purpose is of special interest in terms of economy and sustainability. In this work the adsorption of the herbicide hexazinone by two montmorillonites saturated with various inorganic and organic cations was determined and the ability of the two clays displaying the highest adsorption capacities [Fe(3+)-saturated Wyoming montmorillonite, (Fe-SW) and hexadecyltrimethylammonium-saturated Arizona montmorillonite (HDTMA-SA)] to act as carriers for slow release of hexazinone and to reduce herbicide leaching losses was evaluated. Hexazinone formulations based on Fe-SW and HDTMA-SA displayed slow release properties in water and soil/water suspensions, reduced herbicide leaching in soil columns, and maintained herbicidal activity, as compared with the currently available commercial hexazinone formulation (wettable powder). Loosely bound hexazinone-HDTMASA formulations, which led to the slowest breakthrough of hexazinone in soil columns along with the greatest amounts of herbicide released from the clay particles, displayed the most interesting characteristics for their use as slow release formulations and to prevent ground water contamination.

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Section: Introductionmentioning

confidence: 99%

Inorganic and Organic Clays as Carriers for Controlled Release of the Herbicide Hexazinone

Celis

Hermosı́n

Carrizosa

et al. 2002

J. Agric. Food Chem.

118

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“…Analysis of these herbicides has been commonly carried out by gas chromatography (GC) with nitrogenphosphorus detection (NPD) (Roy et al, 1989;Sa ´nchez-Brunete et al, 1994;Pardue, 1995;Pe ´rez et al, 1997) or in some cases by electron capture detection (Smith et al, 1995) and also by reversed-phase liquid chromatography with UV detection (McIntosh et al, 1984;Battista et al, 1988;Lydon et al, 1991;Ely et al, 1993). GC coupled with mass spectrometry (MS) has been used sometimes for the confirmation of residues (Felding, 1992;Sa ´nchez-Brunete et al, 1994;Pe ´rez et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

Analytical Methods for the Determination in Soil of Herbicides Used in Forestry by GC−NPD and GC/MS

Pérez¹,

Sánchez‐Brunete²,

Miguel³

et al. 1998

J. Agric. Food Chem.

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Analysis of several herbicides used to control weeds in forestry (simazine, hexazinone, pendimethalin, and thiazopyr) has been performed by GC-NPD and GC/MS. A method based on the extraction of soil samples in small columns has been used for the determination of these compounds in soil. Acetone/water (90:10) was used for the extraction of all four compounds, and ethyl acetate can be used when the determination of hexazinone is not required. The recoveries through the method were always >80%, and the detection limit was <0.01 ppm for GC-NPD and GC/MS. Soil samples from experimental fields, taken at different times after treatment from the plow layer, were analyzed according to this method, and values similar to those obtained by a conventional method using mechanical shaking extraction were obtained.

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“…However, after many years, adverse effects on health or environment were often highlighted. Herbicides of the triazine family are leached and found in groundwater (Felding 1992b, a, Hall et al 1991 while organochlorine insecticides may accumulate in the environment or in lipophilic parts of some organisms (Caro 1969, Mueller et al 2008, Ntow et al 2008, Smith &Gangolli 2002. Thus, intensive agriculture, as practiced for several decades in developed countries, is changing and in particular, the part concerning the protection of cultivated plants (Rabbinge &vanOijen 1997).…”

Section: Introductionmentioning

confidence: 99%

Synthesis and evaluation as biodegradable herbicides of halogenated analogs of L-meta-tyrosine

Movellan

Rocher

Chikh

et al. 2012

Environ Sci Pollut Res

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L-meta-tyrosine is an herbicidal nonprotein amino acid isolated some years ago from fine fescue grasses and characterized by its almost immediate microbial degradation in soil (half-life <24 h). Nine monohalogenated or dihalogenated analogs of this allelochemical have been obtained through a seven-step stereoselective synthesis from commercial halogenated phenols. Bioassays showed a large range of biological responses, from a growth root inhibition of lettuce seedling similar to that noted with m-tyrosine [2-amino-3-(2-chloro-5-hydroxyphenyl)propanoic acid or compound 8b] to an increase of the primary root growth concomitant with a delay of secondary root initiation [2-amino-3-[2-fluoro-5-hydroxy-3-(trifluoromethyl)phenyl]propanoic acid or compound 8h]. Compound 8b was slightly less degraded than m-tyrosine in the nonsterilized nutritive solution used for lettuce development, while the concentration of compound 8h remained unchanged for at least 2 weeks. These data indicate that it is possible to manipulate both biological properties and degradation of m-tyrosine by halogen addition.

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Leaching of atrazine and hexazinone from Abies nordmanniana (Steven) spach plantations

Cited by 17 publications

References 9 publications

Inorganic and Organic Clays as Carriers for Controlled Release of the Herbicide Hexazinone

Inorganic and Organic Clays as Carriers for Controlled Release of the Herbicide Hexazinone

Analytical Methods for the Determination in Soil of Herbicides Used in Forestry by GC−NPD and GC/MS

Synthesis and evaluation as biodegradable herbicides of halogenated analogs of L-meta-tyrosine

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