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Chemical and toxicological properties of controlled release granular formulations of acetamiprid using wax matrix  

Lee, Weon-Kee (Central Research Institute, Kyung Nong Co.)
Yang, Kyung-Hyung (Central Research Institute, Kyung Nong Co.)
Lee, Chang-Hyuk (Central Research Institute, Kyung Nong Co.)
Lee, Seung-Il (Department of Friendly Environmental Agro-technology, Sorabol College)
Hwang, In-Cheon (Central Research Institute, Kyung Nong Co.)
Publication Information
The Korean Journal of Pesticide Science / v.9, no.3, 2005 , pp. 243-249 More about this Journal
Abstract
The chemical and toxicological studies were conducted with acetamiprid 2% granules including different controlling agents for development of controlled-release acetamiprid 2% granule. The fundamental formulation recipe of acetamiprid 2% granule was prepared by the insoluble matrix using polyethylene wax. Starch, cellulose and mineral (calcium carbonate) were used as controlling agents. As a result of studies, release rate of active ingredient from granules into water static condition at $25^{\circ}C$ was increased by addition of starch and cellulose, but was decreased by addition of calcium carbonate. We could select calcium carbonate as controlling agent and make three granules which there were difference in release profiles of active ingredient according to contents of polyethylene wax. 24 hours-release rates of acetamiprid from three granules into water static condition at $25^{\circ}C$ were respectively 75, 50 and 25% when contents of wax were 2, 10 and 20%. The granule which 24 hours-release rate was 25% showed lower acute toxicity against mice and rats.
Keywords
controlled-release granule; controlling agent; wax matrix; acetamiprid;
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