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首页> 外文期刊>RSC Advances >Tannic acid-based nanopesticides coating with highly improved foliage adhesion to enhance foliar retention
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Tannic acid-based nanopesticides coating with highly improved foliage adhesion to enhance foliar retention

机译：单宁酸基纳米农药涂层，具有极高的叶子附着力，可增强叶面保持力

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Poor utilization efficiency of conventional pesticide formulation has resulted in overuse, which could increase costs, toxicity to other non-target organisms, concerns about human health and safety, groundwater contamination, causing ecosystem destruction and food pollution. The folia-adhesive formulation is supposed to enhance foliar retention time and utilization efficiency. According to the microstructure of the foliage, the nanopesticides surfaces were modified by affinity groups to improve folia adhesion and decrease the loss from crop foliage. In this study, tannic acid, a bioadhesive natural molecule, has been applied to develop abamectin nanopesticide (Abam-PLA-Tannin-NS) and azoxystrobin nanopesticide (Azox-PLA-Tannin-NS) with strong adhesion to foliage by chemical modification. Abam-PLA-Tannin-NS and Azox-PLA-Tannin-NS presented better photostability and continuous release behavior. The retention rates of Abam-PLA-Tannin-NS and Azox-PLA-Tannin-NS on the foliage was remarkably enhanced by more than 50%, compared with unmodified nanopesticides. Resultantly, the indoor toxicity of Abam-PLA-Tannin-NS and antifungal activity of Azox-PLA-Tannin-NS were enhanced. The interaction force between tannic acid coating nanoparticles and foliage was mainly from hydrogen bonding. Our findings could be beneficial to develop novel leaf-adhesive nanopesticides with high retention time and bioavailability.
机译：常规农药制剂的利用效率差导致过度使用，这可能会增加成本，对其他非目标生物的毒性，对人类健康和安全的担忧，地下水污染，造成生态系统破坏和食品污染。叶面胶配方有望增加叶面保留时间和利用效率。根据叶片的微观结构，通过亲和基团修饰了纳米农药的表面，以改善叶的附着力并减少作物叶片的损失。在这项研究中，单宁酸是一种具有生物粘附力的天然分子，已被用于开发通过化学修饰对树叶具有强粘附力的阿维菌素纳米农药（Abam-PLA-Tannin-NS）和嘧菌酯纳米农药（Azox-PLA-Tannin-NS）。 Abam-PLA-单宁-NS和Azox-PLA-单宁-NS表现出更好的光稳定性和连续释放行为。与未经修饰的纳米农药相比，Abam-PLA-单宁-NS和Azox-PLA-单宁-NS在树叶上的保留率显着提高了50％以上。结果，增强了Abam-PLA-单宁-NS的室内毒性和Azox-PLA-单宁-NS的抗真菌活性。单宁酸涂层纳米粒子与叶片之间的相互作用力主要来自氢键。我们的发现可能有益于开发具有高保留时间和生物利用度的新型叶片粘合纳米农药。

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