 This research paper examined the chemical composition of two types of essential oils from Mediterranean Cyprus and northern white cedar, and their ability to inhibit the growth of four different species of pathogenic fungi. The authors discovered that the essential oils contained high concentrations of moniterpenes, sesquiterpenes, moniterpenes and sesquiterpene alcohols, ethers and esters, and flavonoids. They also observed that the essential oils had significant antifungal activity against certain strains of the pathogenic fungi tested. In particular, the essential oil from Mediterranean Cyprus showed the most effective antifungal activity against the fusarial wilt, fusarium-gramminerum FG-30, and snowmold, microdochium-navali, pathogens. This article was authored by I.M. Fitssev, I.N. Nikitin, A.M. Rokmiva, and others.