期刊
CARBOHYDRATE POLYMERS
卷 277, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2021.118880
关键词
Chitosan; Gelatin; Dinotefuran; Microsphere; Pesticide; Trialeurodes vaporariorum
资金
- National Key Research and Development Program of China [2016YFD0200500]
In this study, neonicotinoid dinotefuran-loaded chitosan-gelatin microspheres were developed using spray-drying technology, resulting in a pH- and temperature-responsive controlled-release system. The microspheres reduced pesticide leaching in soil and improved plant absorption, showing better efficacy against target pests.
Neonicotinoid-based pesticides are extensively used owing to their broad insecticidal spectrum and activity. We developed neonicotinoid dinotefuran (DIN)-loaded chitosan-gelatin microspheres using a spray-drying technology, resulting in a pH- and temperature-responsive controlled-release system. Upon introducing chitosan into the triple-helix structure of gelatin, the physically modified gelatin microspheres became smooth, round, and solid, improving their thermal storage stability. The spray-drying parameters were optimized using three-dimensional surface plots. When scaled up under optimal conditions, the corresponding loading content and encapsulation efficiency were 21.5% and 98.17%, respectively. Compared with commercial dinotefuran granules, our biodegradable composite carriers achieved the immobilization of dinotefuran to reduce pesticide leaching by 5.57-19.89% in soil, improved the soil half-life of DIN, and improved its cumulative absorption by plants. Therefore, the microspheres showed better efficacy against Trialeurodes vaporariorum. Our results confirm that this simple approach can improve the utilization efficiency of neonicotinoids, decrease leaching loss, and promote ecological safety.
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