Effect of Granule Carrier, Binder and Encapsulating Material on Carbofuran Release

Granular formulations of carbofuran with six different carriers, two binders and three encapsulating materials have been found to improve its hydrolytic stability and the consequent toxicant release in water over the proprietary product. The release was significantly more in case of attapulgite (52.61%)over bentonite (43.40%) which in turn was significantly more over soapstone (36.28%). All of these three carriers were statistically superior to China clay, gypsum and talc The use of gum acacia and starch as binderr provided statistically superior recipes over the carrier plus sarbofuran treatments which in turn were superior to the proprietary product. The binder treatment coupled with the encapsulation material further significantly improved carbofuan stability/release in water. The maximum mean release of 47.26% was obtained in the treatment (T4) involving gum acacia as a binder asd rosin as an encapsulating material.