Study on long-term pest control and stability of double-layer pesticide carrier in indoor and outdoor environment
Study on long-term pest control and stability of double-layer pesticide carrier in indoor and outdoor environment
复制标题
双层农药载体室内外环境长期害虫防治及稳定性研究
DOI：
10.1016/j.cej.2020.126342
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发表时间：
2021-01-01
影响因子：
15.1
通讯作者：
Lin, Baofeng
中科院分区：
文献类型：
--
作者：
Huang, Guohuan;Deng, Yongfu;Lin, Baofeng
控释农药是防治水稻病虫害的有效剂型。然而，这些配方在作物生长的整个过程中如何持续稳定地释放农药是一个很大的挑战。本文基于木质素磺酸钠（SL）上磺酸基与质子化uuo -66- nh2的化学交联，成功构建了一种新型双层农药载体，实现了对害虫的长期防治。在传统的室内药物释放的基础上，本研究进一步研究了药物在土柱中的释放行为，以模拟室外环境。释放结果表明，负载噻虫胺（TMX）的uuo -66- nh2 /SL不仅克服了土壤中天然高分子载体爆发释放的不足，而且解决了mofs载体早期释放过慢的问题。具体而言，tmx负载的UIO-66-NH2/SL在室外环境中具有优异的生物安全性和稳定性。结果表明，经tmx负载的UIO-66-NH2/SL处理的水稻在42 d内不受害虫影响，植株高度可达41 cm。未包膜TMX处理的水稻在16 d时受到虫害，株高仅为21 cm。因此，本研究开发了一种更适合实际工程应用的控释农药。
Controlled-release pesticides are promising formulations for rice pest control. However, it is a big challenge for these formulations to sustainably and stably release pesticide in the soil at the whole process of crop growth. In this paper, based on chemical crosslinking of sulfonic acid group on sodium lignosulfonate (SL) with protonated UIO-66-NH2, we successfully construct a novel double-layer pesticide carrier to achieve the long-term pest control. Besides traditional indoor drug release, this work further investigates the release behavior in the soil column to simulate the outdoor environment. The results of release show that thiamethoxam (TMX)-loaded UIO-66-NH2/SL not only overcomes the shortage of burst release for natural polymer carriers in the soil, but also solves the problem that MOFs-based carrier is released too slowly in the early stage. Specifically, TMX-loaded UIO-66-NH2/SL has excellent biosafety and stability in outdoor environment. As a result, the rice treated by TMX-loaded UIO-66-NH2/SL is not affected by pests within 42 d, and the plant height of rice is up to 41 cm. In contrast, the rice treated by uncoated TMX is affected by pests at 16 d, and the plant height of rice is only 21 cm. Therefore, this study has developed a controlled-release pesticide that is more suitable for practical engineering applications.