Abstract
Atrazine is more reliable, flexible, effective and less expensive herbicide than any other available weed control approaches. However, easy leaching of atrazine is a matter of great environmental and health concern which limits its strong recommendation for practical applicability. Hence, controlled release formulations of atrazine, specially based on natural polysaccharide, are required for delivery and resolve the problems associated with conventional formulations. In the present work, slow release atrazine containing alginate-agar based bead formulations have been prepared and characterized by scanning electron micrography, Fourier transform infrared spectroscopy and swelling studies. The release of atrazine from the beads occurred through non-Fickian diffusion mechanism. The release of atrazine from the beads in the soil has been observed slower and lesser in soil as compared to the in vitro release. Besides providing the slow release of atrazine, these formulations after degradation may enhance the fertility of the soil.
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