Lampiri Evagelia, Losic Dusan, Athanassiou Christos G
School of Agricultural Sciences, University of Thessaly, Phytokou Str Nea Ionia, Magnesia, Volos, 38446, Greece.
School of Chemical Engineering, The University of Adelaide, Adelaide, SA, 5005, Australia.
Environ Sci Pollut Res Int. 2025 Jul;32(35):21243-21252. doi: 10.1007/s11356-025-36899-y. Epub 2025 Sep 3.
This investigation assessed the insecticidal efficacy of two graphene formulations (Gr1 and Gr2) on wheat kernels against adults of Sitophilus oryzae (L.) (Coleoptera: Curculionidae) and Oryzaephilus surinamensis (L.) (Coleoptera: Silvanidae) in relation to temperature and relative humidity (RH) at concentrations of 500 and 1000 ppm. These bioassays were conducted in all possible combinations of three temperature levels: 20, 25, and 30 °C, as well as two relative humidity levels (55 and 75%). Progeny production was also evaluated 65 days later. The species that emerged as the most susceptible to graphene-treated wheat kernels was O. surinamensis compared to S. oryzae, regardless of temperature, RH, dose, and graphene formulation. At high RH levels, increasing temperature led to a decrease in mortality of S. oryzae in both Gr1 and Gr2, whereas at low RH levels, the results were dependent on the dosage of graphene formulation. At 75% RH, mortality ranged at significantly lower rates compared to their corresponding ones at 55% RH, while RH appeared to have no effect at 20 °C regardless of graphene formulation. Total inhibition of the emergence of progeny production was recorded for O. surinamensis, while graphene failed to suppress the progeny of S. oryzae. The current study's findings offer evidence supporting the feasibility of using graphene as an alternative to chemical-based pest control approach for protecting grain stored products.
本研究评估了两种石墨烯制剂（Gr1和Gr2）在500和1000 ppm浓度下，针对小麦粒上的米象（Sitophilus oryzae (L.)，鞘翅目：象甲科）和锯谷盗（Oryzaephilus surinamensis (L.)，鞘翅目：锯谷盗科）成虫的杀虫效果，以及温度和相对湿度（RH）的影响。这些生物测定在三个温度水平（20、25和30°C）以及两个相对湿度水平（55%和75%）的所有可能组合下进行。65天后还评估了子代的产生情况。无论温度、相对湿度、剂量和石墨烯制剂如何，与米象相比，锯谷盗对经石墨烯处理的小麦粒最为敏感。在高相对湿度水平下，温度升高导致米象在Gr1和Gr2中的死亡率均下降，而在低相对湿度水平下，结果取决于石墨烯制剂的剂量。在75%相对湿度下，死亡率显著低于其在55%相对湿度下的相应死亡率，而在20°C时，无论石墨烯制剂如何，相对湿度似乎都没有影响。锯谷盗的子代产生完全受到抑制，而石墨烯未能抑制米象的子代。当前研究结果为使用石墨烯作为保护储粮产品的化学害虫防治方法的替代方案的可行性提供了证据支持。
