Gao Xiaoduo, Shi Fengyu, Peng Fei, Shi Xuejuan, Cheng Caihong, Hou Wenlong, Xie Haicui, Lin Xiaohu, Wang Xiuping
College of Agronomy and Biotechnology, Hebei Normal University of Science and Technology Qinhuangdao 066000 PR China.
Hebei Key Laboratory of Crop Stress Biology (in preparation), Hebei Normal University of Science and Technology Qinhuangdao 066000 PR China
RSC Adv. 2021 Nov 9;11(57):36089-36097. doi: 10.1039/d1ra06505j. eCollection 2021 Nov 4.
Nanopesticides with controlled release can achieve more effective utilization of pesticides. Here, to enhance the adsorption of pesticides onto the target organisms, the formulation of pesticides with temperature-responsive release was proposed by combing graphene oxide (GO) and existing pyrethroid pesticides (cyhalothrin, bifenthrin and fenpropathrin). Pesticides were loaded onto GO nanosheets as a carrier a simple physisorption process, and the GO-pesticide nanocomposites exhibited temperature-responsive release and excellent storage stability, which are of vital importance to the practical application. Furthermore, we assessed the bioactivity of the GO-pesticide nanocomposites against spider mites ( Koch) indoors and in the field. As a result, GO-pesticide nanocomposites had many folds higher bioactivity than individual pesticides, and could be adsorbed on the cuticle of and surface of bean leaves with highly uniform dispersibility. The easy preparation and higher bioactivity of GO-pesticide nanocomposites indicate their promising application potential in pest control and green agriculture.
具有控释功能的纳米农药能够实现农药更有效的利用。在此，为增强农药在目标生物上的吸附，通过将氧化石墨烯（GO）与现有的拟除虫菊酯类农药（氯氟氰菊酯、联苯菊酯和甲氰菊酯）相结合，提出了具有温度响应释放功能的农药制剂。农药通过简单的物理吸附过程负载到作为载体的氧化石墨烯纳米片上，并且氧化石墨烯 - 农药纳米复合材料表现出温度响应释放特性和优异的储存稳定性，这对实际应用至关重要。此外，我们在室内和田间评估了氧化石墨烯 - 农药纳米复合材料对叶螨（科赫）的生物活性。结果表明，氧化石墨烯 - 农药纳米复合材料的生物活性比单一农药高许多倍，并且能够以高度均匀的分散性吸附在叶螨的角质层和豆叶表面。氧化石墨烯 - 农药纳米复合材料易于制备且生物活性更高，表明它们在害虫防治和绿色农业中具有广阔的应用潜力。
