Growth of Wood-Inhabiting Fungi in Saturated Atmospheres of Monoterpenoids

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Abstract
SUMMARY Growth of Trichoderma viride, Lenzites saepiaria, and Schizophyllum commune was inhibited more than 50% in saturated atmospheres of l-α-pinene, d-α-pinene, l-β-pinene, l-limonene, d-limonene, p-cymene, dl-camphene, myrcene, and terpinolene. Significant differences were detected between terpenes in ability to suppress growth, but the relative toxicity of each terpene varied with the fungus. Only d-α-pinene, p-cymene, and terpinolene caused more than 50% inhibition of the least sensitive fungus, Ceratocystis minor. These results suggest that in southern pines d-α-pinene generally is the principal terpene component limiting invasion of sapwood by C. minor. Trichoderma viride was most suppressed by the terpenes, which may partially account for the delayed entry of that fungus into sapwood of beetle-attacked trees. A significant variation in response to terpene vapors was detected between isolates of C. minor and T. viride.