Li Xue, Wang Qinying, Wang Xiuping, Wang Zhenying
State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
Plant Protection College, Hebei Agricultural University, Baoding 071000, China.
Nanomaterials (Basel). 2022 Nov 12;12(22):3985. doi: 10.3390/nano12223985.
Fall armyworm , a native insect pest in tropical and subtropical America, has rapidly spread to most parts of China and become a major pest of corn and other crops since invading in early January 2019. As an emergency and important control measure, chemical control of has the advantages of quick effect and low cost. However, long-term and large-scale use of pesticides might pollute the environment and increase pest resistance. By improving the control effect and reducing the dosage of chemical pesticides, graphene oxide (GO) is used synergistically with insecticides to increase control efficacy to achieve low-cost and sustainable management of insect pests as a new type of synergist. In this study, graphene oxide was compounded with insecticides to form nanocomposites. To clarify pest physiological responses, the laboratory toxicity of graphene oxide-insecticide nanocomposites was measured on the larvae of . The results demonstrated that GO could enhance the activity of four selected pesticides: chlorantraniliprole (Chl), beta cypermethrin (Bet), methoxyhydrazide (Met) and spinetoram (Spi). Compared with pesticides alone, the toxicity of Chl-GO, Bet-GO, Met-GO and Spi-GO mixtures to the third instar larvae of increased by 1.56, 1.54, 2.53 and 1.74 times, respectively. The easy preparation and higher bioactivity of GO-pesticide nanocomposites indicated their promising application potential in pest control.
草地贪夜蛾是美洲热带和亚热带地区的一种本土害虫，自2019年1月初入侵以来，已迅速蔓延至中国大部分地区，并成为玉米和其他作物的主要害虫。作为一项紧急且重要的防治措施，化学防治具有见效快、成本低的优点。然而，长期大规模使用农药可能会污染环境并增加害虫抗药性。通过提高防治效果并减少化学农药用量，氧化石墨烯（GO）与杀虫剂协同使用，作为一种新型增效剂来提高防治效果，以实现低成本且可持续的害虫治理。在本研究中，氧化石墨烯与杀虫剂复合形成纳米复合材料。为阐明害虫的生理反应，测定了氧化石墨烯 - 杀虫剂纳米复合材料对[具体害虫名称缺失]幼虫的室内毒性。结果表明，GO可增强四种选定农药的活性：氯虫苯甲酰胺（Chl）、高效氯氰菊酯（Bet）、甲氧虫酰肼（Met）和多杀霉素（Spi）。与单独使用农药相比，Chl - GO、Bet - GO、Met - GO和Spi - GO混合物对[具体害虫名称缺失]三龄幼虫的毒性分别提高了1.56倍、1.54倍、2.53倍和1.74倍。GO - 农药纳米复合材料易于制备且具有更高的生物活性，表明其在害虫防治中具有广阔的应用潜力。
