مطالعه سمیت سنتز سبز نانو ذرات اکسید روی مشتق شده از عصاره جلبک قهوه ای (Sargassum ilicifolium) بر شته سبز هلو (Myzus persicae) و سفید بالک (Trialeurodes vaporariorum)

The green peach aphid (Myzus persicae (Sulzer)) and the whitefly (Trialeurodes vaporariorum Westwood) are important polyphagous and omnivorous pests that feed heavily on plant sap. These pests also produce honeydew and transmit many plant viruses that are very important in greenhouses. The green synthesis of nanoparticles represents an advanced, environmentally friendly method that can improve sustainable agriculture by reducing the use of chemical pesticides. In this study, the effect of toxicity of zinc oxide nanoparticles (ZnO-NPs) obtained from the extract of brown seaweed Sargassum ilicifolium at different concentrations on the lethality of green peach aphid and whitefly was investigated. The concentrations of ZnO-NPs were tested for the green peach aphid at 0, 180, 330, 600, 1000, 1100 and 2000 ppm and for the whitefly at 0, 250, 330, 436, 575, 760 and 1000 ppm. The identification of the average size and stability of ZnO-NPs was analyzed using dynamic light scattering (DLS), X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM). The results showed that ZnO-NPs from the extract of brown algae S. ilicifolium have a high insecticidal effect on green peach aphid and whitefly in 96 hours with LC50 (316.8 ppm) and (407.4 ppm), respectively. The use of ZnO-NPs at concentrations of 1100 and 2000 ppm results in 96.6 and 100% losses to the green peach aphid, respectively, and a concentration of 1000 ppm results in 96.6% losses to the whitefly after 96 hours. Apart from being relatively cheap and environmentally friendly compared to other metal oxide nanoparticles, the use of ZnO-NPs increases the toxicity of zinc to pests and reduces the consumption of chemical pesticides that can be effective in the integrated control of these pests.