Korea University Food Microbiology Laboratory

Antimicrobial activities of plant essential oil vapours against Acidovorax citrulli and Xanthomonas campestris on Cucurbitaceae, Brassicaceae and Solanaceae seeds
Year of publication 2022
Author Chung, M. Y., Kim, H., Beuchat, L. R., & Ryu, J. H.
Publication in journal Journal of Applied Microbiology
Status of publication Published


This study was done to develop a seed decontamination treatment for organic seeds against plant pathogens (Acidovorax citrulli and Xanthomonas campestris) using essential oil (EO) vapours without affecting the seeds' germination rate.

Methods and Results

By using a diffusion assay and determining minimum inhibitory and lethal concentrations, we screened two EO vapours which were most inhibitory to Acitrulli (cinnamon bark and garlic EO vapours) and Xcampestris (onion and garlic EO vapours). After 48 h of exposure to EO vapours at 25°C and 43% or 85% relative humidity (RH), no significant decrease (p > 0.05) in germination rates was observed compared with those of control seeds. It was observed that EO vapour treatment at 25°C and 43% or 85% RH for 48 h caused significant population reductions (p ≤ 0.05) (ca. 0.3–2.6 log colony forming unit/g) compared to those of untreated seeds.


Applications of EO vapours showed significant (p ≤ 0.05) antimicrobial effects against Acitrulli and Xcampestris on both laboratory mediums and plant seeds without decreasing the germination rate of seeds.

Significance and Impact of the Study

This study provides useful information for the development of natural seed sterilization treatments using EO vapours.