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This study aimed at evaluating the antibacterial activity of  Cinnamomum cassia  and  Syzygium aromaticum  essential oils and their nanoparticles (EOs-NPS) against  Erwinia amylovora , the causal agent of fire blight disease. First, EOs of  C. cassia  and  S. aromaticum  were obtained by hydrodistillation and analysed using a GC–MS/FID. Results showed that the main components of  C. cassia  EOs are E-Cinnamaldehyde (73.23%), alpha-Copaene (6.44%), and Eugenol (4.23%) while the EOs of  S. aromaticum  showed the presence of Eugenol (58.64%), β-Caryophyllene (32.91%), and Humulene (3.25%).  C. cassia  EOs was the most effective with an inhibition zone of 37.7 mm and a minimum bactericidal concentration (MBC) of 1.04%. However, EOs-NPS of  C. cassia  had greater effects than  S. aromaticum  with an MBC of 0.75%, rather than the effect of EOs alone. Significant reduction of the disease incidence (86%) was observed in the  in vivo  pre-treatment using EOs-NPS of  C. cassia.  Therefore,  C. cassia  EOs-NPS is recommended against  E. amylovora .

archives of phytopathology and plant protection

Chemical composition and antibacterial activity of essential oils of  Cinnamomum cassia  and  Syzygium aromaticum  plants and their nanoparticles against  Erwinia amylovora