AI Article Synopsis
- Soil fumigants are effective against soil-borne diseases but face limitations due to rapid emissions and short effectiveness.
- This study introduces a hybrid silica/polysaccharide hydrogel that encapsulates dimethyl disulfide (DMDS) to improve the duration of release, with findings showing a significant extension in release time and enhanced stability compared to standard silica.
- The hydrogel demonstrates improved water retention, a triggered release based on pH levels, and increased bioactivity, offering a promising method for reducing emissions while effectively protecting plants.
Article Abstract
Soil fumigant has been extensively used for excellent efficacy on soil-borne diseases. However, rapid emission and insufficient effective duration typically limit its application. In this study, hybrid silica/polysaccharide hydrogel was proposed (SIL/Cu/DMDS) by emulsion-gelation method to encapsulate dimethyl disulfide (DMDS). The orthogonal study was used to optimize the preparation parameters for LC and EE of SIL/Cu/DMDS, which was 10.39 % and 71.05 %, respectively. Compared with silica, the time for 90 % of the total emissions was extended by 4.36 times. The hydrogel possessed a longer persistent duration and the degradation half-life of DMDS was 3.47 times greater than that of silica alone. Moreover, the electrostatic interaction between abundant groups of polysaccharide hydrogel bestowed DMDS with pH-triggered release behavior. Additionally, SIL/Cu/DMDS had excellent water holding and water retention capacity. The bioactivity of the hydrogel was 58.1 % higher than that of DMDS TC due to the strong synergistic effect between DMDS and the carriers (chitosan and Cu), and showed obvious biosafety to cucumber seeds. This study seeks to provide a potential approach to develop hybrid polysaccharide hydrogel to control soil fumigants release, reduce emission and enhance bioactivity in plant protection.
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| http://dx.doi.org/10.1016/j.ijbiomac.2023.125132 | DOI Listing |
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