The State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, PR China; College of Agronomy and Biotechnology, Hebei Normal University of Science and Technology, Qinhuangdao, 066000, PR China.
College of Agronomy and Biotechnology, Hebei Normal University of Science and Technology, Qinhuangdao, 066000, PR China.
Colloids Surf B Biointerfaces. 2019 Jan 1;173:632-638. doi: 10.1016/j.colsurfb.2018.10.010. Epub 2018 Oct 5.
Synergistic combination of pesticides and nanomaterials has been rarely reported in pest management science at present. In this work, graphene oxide (GO) was synergistically used with three types of pesticides (pyridaben (Pyr), chlorpyrifos (Chl) and beta-cyfluthrin (Cyf) respectively as acaricide against two economically important spider mites Tetranychus truncatus and T. urticae Koch. The results demonstrated that GO can enhance the activity of three types of pesticides. Compared with pesticides, the GO-Cyf, GO-Pyr and GO-Chl mixtures exhibited 1.77-, 1.56- and 1.55-fold higher contact toxicity against T. truncatus, and 1.50-, 1.75-, and 1.78-fold higher contact toxicity against T. urticae. SEM results showed that pesticide can adsorbed on the surface of GO. The synergistic mechanism may be that GO can serve as a carrier of pesticides, which can be adsorbed on the surface of mites and thus improve efficacy and utilization efficiency of pesticides. This kind of GO-based nanoscale pesticide delivery system may find widespread application in the field of plant protection in the future.
目前，在害虫管理科学中，农药和纳米材料的协同组合很少有报道。在这项工作中，氧化石墨烯（GO）分别与三种农药（哒螨灵（Pyr）、毒死蜱（Chl）和高效氯氟氰菊酯（Cyf））协同使用，作为杀螨剂防治两种重要的经济叶螨——二斑叶螨和朱砂叶螨。结果表明，GO 可以增强三种类型农药的活性。与农药相比，GO-Cyf、GO-Pyr 和 GO-Chl 混合物对 T. truncatus 的接触毒性分别提高了 1.77 倍、1.56 倍和 1.55 倍，对 T. urticae 的接触毒性分别提高了 1.50 倍、1.75 倍和 1.78 倍。SEM 结果表明，农药可以吸附在 GO 的表面。协同机制可能是 GO 可以作为农药的载体，吸附在螨虫表面，从而提高农药的功效和利用率。这种基于 GO 的纳米级农药输送系统在未来可能会在植物保护领域得到广泛应用。
