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Notes: Inhibition of Poria weirii and Fomes annosus by Linoleic Acid

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The potassium salt of linoleic acid, a long-chain fatty acid, inhibited growth of Poria weirii and Fomes annosus in vitro when incorporated into synthetic liquid media at concentrations of 0 1 mg/ml or higher. Increasing concentrations (up to 4.0 g/ml) resulted in significantly increasing inhibition in both fungi. Inhibitory effects were particularly striking for Poria weirii: growth was negligible at concentrations of 1.0 mg/ml or higher. Resistance of Alnus rubra to infection by P. weirii is likely due in part to alder's ability to produce linoleic acid. Forest Sci. 16:329-330.

Keywords: Alnus rubra; Biological control

Document Type: News

Affiliations: Principal Microbiologist, Forestry Sciences Lab., Pacific Northwest Forest and Range Exp. Sta., Forest Service, USDA, Corvallis, Professor, Dep. of Microbiology, Oregon State Univ.

Publication date: September 1, 1970

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