Evaluation of the antifungal activity of copper oxide nanoparticles and essential oils of oregano, cumin and eucalyptus against the causative agent of gray mold disease of grape

Document Type : Research Paper

Authors

1 Plant Protection Department, Faculty of Agriculture, University of Tabriz, Tabriz, Iran

2 Allameh Tabatabaei Brilliant Talents High School, Bonab, Iran

10.22034/arpp.2025.20878

Abstract

The gray mold disease of grapes, caused by the Botrytis cinerea, is one of the most important grape diseases, leading to substantial economic losses annually. Today, synthetic chemical pesticides are widely used to control plant pathogens. However, their use is often limited due to environmental issues, pesticide residues, health concerns, and the emergence of resistant pathogen strains. Therefore, in the present study, to find safe alternatives to synthetic chemical compounds, the antifungal activity of essential oils from several plant species, including oregano, cumin, eucalyptus, and copper oxide nanoparticles, together with the fungicides Luna (Trifloxystrobin+Fluopyram) and Topas (Penconazole), was investigated against B. cinerea under in vitro conditions. The identification of the components of the essential oils was performed using a gas chromatography-mass spectrometry (GC-MS). The results showed that oregano essential oil at a concentration of 1000 ppm exhibited the highest inhibition rate (71.42%), while the Luna fungicide at a concentration of 62.5 ppm showed the lowest inhibition rate (1.7%). Additionally, GC-MS analysis revealed that α-Pinene, Pulegone, and β-Pinene were the major constituents of the essential oils of eucalyptus, oregano, and cumin, respectively. Based on the results of this study and similar research, it can be concluded that the application of oregano and cumin essential oils is effective in controlling B. cinerea and can be considered potential substitutes for chemical fungicides in inhibiting the growth of B. cinerea. However, to utilize these essential oils for controlling plant pathogens, more comprehensive studies are necessary.

Keywords



Articles in Press, Accepted Manuscript
Available Online from 03 December 2025
  • Receive Date: 05 July 2025
  • Revise Date: 25 July 2025
  • Accept Date: 27 July 2025