In order to investigate the impact of E. adenophorum oil extracts on the hyphal morphology of P. myriotylum, a small amount of hyphae was taken from the edges of a colony grown on PDA treated with 80 μg/ml E. adenophorum oil extracts after ten days of incubation at 28 ± 1°C. The samples were then dipped in sterile water on a glass slide, covered with a glass cover slip, and observed under the microscope (Olympus BX63) at 400x magnification to determine any structural modifications. A control group, cultured without E. adenophorum oil extracts, was processed using the same procedures. Photographs were taken with computer-attached cellSens™ technology (Olympus Corporation, Japan).