Abstract
Pesticide controlled release technology is an effective measure to improve the efficiency of pesticide utilization. In this study, the controlled releasing gel microspheres of spinetoram were prepared by suspension-crosslinking. Carboxymethyl chitosan was the carrier, and calcium chloride and glutaraldehyde were the cross-linking agent. The diameter and morphology of microspheres were observed. The thermal stabilities of spinetoram-loaded microspheres were evaluated. The release properties of spinetoram loaded gel microspheres were investigated. The results showed that pesticide loaded microspheres were elastic balls with high strength, more thermal stability than traditional pesticides, and exhibited good performance of pesticide sustained release. The release of spinetoram was governed by the combination of swelling and erosion of carboxymethyl chitosan. This study would provide reference for the application of carboxymethyl chitosan in pesticide reduction and efficiency.
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