A Facile Approach to Increasing the Foliage Retention of Pesticides Based on Coating with a Tannic Acid/Fe3+ Complex

文献类型： 外文期刊

第一作者： Zhi, Heng

作者： Zhi, Heng;Yu, Manli;Yao, Junwei;Sun, Changjiao;Cui, Bo;Zhao, Xiang;Wang, Yan;Cui, Haixin;Zeng, Zhanghua;Yao, Junwei

作者机构：

关键词： sustained release; toxicity; water dispersible granule; photostability; bioavailability

期刊名称：COATINGS （ 影响因子：2.881； 五年影响因子：3.038 ）

ISSN：

年卷期： 2020 年 10 卷 4 期

页码：

收录情况： SCI

摘要： The effective utilization of many conventional pesticide formulations is less than 30%, which can increase the environmental impact of these substances. This degree of waste could be reduced by improving the adhesion of pesticides to foliage. In the present work, a complex comprising tannic acid (TA) and Fe3+ ions was used to encapsulate azoxystrobin and avermectin water dispersible granule (WDG) formulations (termed Az-WDG-TA and Av-WDG-TA) to improve adhesion. The treated pesticides exhibited improved photostability as well as sustained continuous release behavior. The retention proportions of the Az-WDG-TA and Av-WDG-TA on cucumber and lettuce foliage were improved by more than 50%. The ability of solutions of these materials to wet foliage was also enhanced after coating, such that the toxicity of Av-WDG-TA to aphids and the antifungal activity of Az-WDG-TA to Fusarium oxysporum were increased by nearly 50%. Given the low cost of TA and Fe3+ compounds and the simple synthesis process, this method represents a promising means of producing foliage-adhesive pesticide formulations with increased retention and bioavailability.

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