Polymeric Microcapsules of Alachlor and Metolachlor:  Preparation and Evaluation of Controlled-Release Properties

The microencapsulation of alachlor and metolachlor in the polymers cellulose acetate butyrate, ethyl cellulose, poly(methyl methacrylate), and poly(α-methylstyrene) with different emulsifiers is described. The controlled-release properties of these formulations were measured under greenhouse conditi...

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Veröffentlicht in:Journal of agricultural and food chemistry 1999-07, Vol.47 (7), p.2908-2913
Hauptverfasser: Dowler, Clyde C, Dailey, Oliver D, Mullinix, Ben G
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container_end_page 2913
container_issue 7
container_start_page 2908
container_title Journal of agricultural and food chemistry
container_volume 47
creator Dowler, Clyde C
Dailey, Oliver D
Mullinix, Ben G
description The microencapsulation of alachlor and metolachlor in the polymers cellulose acetate butyrate, ethyl cellulose, poly(methyl methacrylate), and poly(α-methylstyrene) with different emulsifiers is described. The controlled-release properties of these formulations were measured under greenhouse conditions on barnyardgrass, crowfootgrass, smallflower morningglory, and Palmer amaranth. The emulsifiers had little effect on the activity of the herbicides. The herbicidal activities of the poly(methyl methacrylate) and poly(α-methylstyrene) formulations were consistently lower on all weed species when compared to the activities of the cellulose acetate butyrate, ethyl cellulose, and commercial formulations. The ethyl cellulose formulation of alachlor exhibited controlled-release properties. The results with metolachlor were similar to those with alachlor except that none of the metolachlor formulations exhibited efficacy superior to that of the commercial formulation or controlled release properties. Keywords: Formulation; microencapsulation; persistence; herbicide activity
doi_str_mv 10.1021/jf981269t
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Agric. Food Chem</addtitle><description>The microencapsulation of alachlor and metolachlor in the polymers cellulose acetate butyrate, ethyl cellulose, poly(methyl methacrylate), and poly(α-methylstyrene) with different emulsifiers is described. The controlled-release properties of these formulations were measured under greenhouse conditions on barnyardgrass, crowfootgrass, smallflower morningglory, and Palmer amaranth. The emulsifiers had little effect on the activity of the herbicides. The herbicidal activities of the poly(methyl methacrylate) and poly(α-methylstyrene) formulations were consistently lower on all weed species when compared to the activities of the cellulose acetate butyrate, ethyl cellulose, and commercial formulations. The ethyl cellulose formulation of alachlor exhibited controlled-release properties. 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Soil science and plant productions</topic><topic>alachlor</topic><topic>Biological and medical sciences</topic><topic>Capsules</topic><topic>Chemical control</topic><topic>controlled release</topic><topic>emulsifiers</topic><topic>Evaluation Studies as Topic</topic><topic>formulations</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>herbicidal activity</topic><topic>herbicidal properties</topic><topic>Herbicides - administration &amp; dosage</topic><topic>Herbicides - chemistry</topic><topic>metolachlor</topic><topic>microencapsulation</topic><topic>Parasitic plants. Weeds</topic><topic>Phytopathology. Animal pests. 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Agric. Food Chem</addtitle><date>1999-07-01</date><risdate>1999</risdate><volume>47</volume><issue>7</issue><spage>2908</spage><epage>2913</epage><pages>2908-2913</pages><issn>0021-8561</issn><eissn>1520-5118</eissn><coden>JAFCAU</coden><abstract>The microencapsulation of alachlor and metolachlor in the polymers cellulose acetate butyrate, ethyl cellulose, poly(methyl methacrylate), and poly(α-methylstyrene) with different emulsifiers is described. The controlled-release properties of these formulations were measured under greenhouse conditions on barnyardgrass, crowfootgrass, smallflower morningglory, and Palmer amaranth. The emulsifiers had little effect on the activity of the herbicides. The herbicidal activities of the poly(methyl methacrylate) and poly(α-methylstyrene) formulations were consistently lower on all weed species when compared to the activities of the cellulose acetate butyrate, ethyl cellulose, and commercial formulations. 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subjects Acetamides - administration & dosage
Acetamides - chemistry
Agronomy. Soil science and plant productions
alachlor
Biological and medical sciences
Capsules
Chemical control
controlled release
emulsifiers
Evaluation Studies as Topic
formulations
Fundamental and applied biological sciences. Psychology
herbicidal activity
herbicidal properties
Herbicides - administration & dosage
Herbicides - chemistry
metolachlor
microencapsulation
Parasitic plants. Weeds
Phytopathology. Animal pests. Plant and forest protection
Polymers
Soil and water pollution
Soil science
Weeds
title Polymeric Microcapsules of Alachlor and Metolachlor:  Preparation and Evaluation of Controlled-Release Properties
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