1. Acetalated dextran microparticles for the smart delivery of pyraclostrobin to control Sclerotinia diseases.
- Author
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Xie, Zhengang, Liang, Wenlong, Xiong, Qiuyu, Zhao, Yanyan, Cheng, Jingli, Li, Xianbin, and Zhao, Jinhao
- Subjects
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DEXTRAN , *PREVENTIVE medicine , *DISEASE management , *BIOPOLYMERS - Abstract
Dextran has emerged as a promising biopolymer carrier for controlled release formulations of pesticides. In this study, pH-sensitive acetalated dextran microparticles (Pyr@Ac-Dex) are prepared to encapsulate and control the release of pyraclostrobin (Pyr). In vitro fungicidal activity experiments showed that the prepared Pyr@Ac-Dex particles show comparable fungicidal ability against S. sclerotiorum compared to that of Pyr technical. In a 10-day pot experiment, the control efficacy of the Pyr@Ac-Dex treatment against S. sclerotiorum (77.1%) is significantly higher than that of Pyr emulsifiable concentrate (Pyr EC) treatment (42.4%). Photodegradation experiments show that compared to Pyr technical, Pyr@Ac-Dex doubles the half-life of Pyr in water. Acute toxicity experiments show that Pyr@Ac-Dex significantly reduced the acute exposure toxicity of Pyr to zebrafish. This study provides an environmentally friendly, feasible, and sustainable strategy for plant disease management. [Display omitted] [ABSTRACT FROM AUTHOR]
- Published
- 2022
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