Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China of Ministry of Agriculture and Rural Affairs, Key Laboratory of Agricultural Green Fine Chemicals of Guangdong Higher Education Institution, Innovative Institute for Plant Health, School of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong 510225, PR China.
Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China of Ministry of Agriculture and Rural Affairs, Key Laboratory of Agricultural Green Fine Chemicals of Guangdong Higher Education Institution, Innovative Institute for Plant Health, School of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong 510225, PR China.
Carbohydr Polym. 2023 Jan 15;300:120260. doi: 10.1016/j.carbpol.2022.120260. Epub 2022 Oct 26.
Inefficient use of traditional pesticides causes serious environmental pollution. Stimuli-responsive pesticide formulations improve the utilization efficiency of target pests and reduce harm to non-target organisms and the environment. Herein, multi-stimuli-responsive avermectin (AVM) polyurea microcapsules (AVM@CM-SS-PU) are prepared by interfacial polymerization with modified carboxymethyl cellulose CMC-SS-NH as the wall material and hexadecane as the temperature-responsive core. The microcapsules are 3.90 μm in size and the encapsulation efficiency of AVM is 88.23 %. The photostability of AVM@CM-SS-PU is 5-times that of AVM solution. The insecticidal effect of AVM solution and AVM emulsifiable concentrate (EC) decreases to 13.3 % and 16.6 %, respectively, after UV irradiation for 180 min, whereas that of AVM@CM-SS-PU still remains at 50.0 %. AVM@CM-SS-PU has better foliar affinity and releases under the stimuli of temperature, glutathione, pH, cellulase, and urease. Hence, it has high insecticidal activity and biosafety. This smart controlled-release pesticide formulation provides a promising solution for green agriculture.
传统杀虫剂的使用效率低下会导致严重的环境污染。刺激响应型农药制剂可提高目标害虫的利用效率，减少对非靶标生物和环境的危害。本文采用界面聚合法，以改性羧甲基纤维素 CMC-SS-NH 为壁材、十六烷为温敏芯材，制备了多刺激响应阿维菌素（AVM）聚脲微胶囊（AVM@CM-SS-PU）。微胶囊粒径为 3.90μm，AVM 的包封率为 88.23%。AVM@CM-SS-PU 的光稳定性是 AVM 溶液的 5 倍。AVM 溶液和 AVM 乳油经紫外光照射 180min 后，杀虫效果分别降至 13.3%和 16.6%，而 AVM@CM-SS-PU 仍保持在 50.0%。AVM@CM-SS-PU 具有较好的叶面亲和力，并在温度、谷胱甘肽、pH 值、纤维素酶和脲酶的刺激下释放。因此，它具有较高的杀虫活性和生物安全性。这种智能控释农药制剂为绿色农业提供了一种有前景的解决方案。
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