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Seven chemicals fail to protect Ponderosa pine from Armillaria root disease in central Washington.Author(s): Gregory M. Filip; Lewis F. Roth
Source: Res. Note PNW-RN-460. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 8 p
Publication Series: Research Note (RN)
Station: Pacific Northwest Research Station
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DescriptionChemicals were applied once to the root collars of small-diameter ponderosa pine (Pinus ponderosa Dougl. ex Laws.) to prevent mortality caused by Armillaria obscura (Pers.) Herink Roll-Harisen (A. meilea sensu lato). After 10 years, none of the 15 treatments appeared to reduce mortality in treated trees vs. untreated trees. Diameter growth of surviving trees averaged 3.0 millimeters per year, and the spread rate of the fungus averaged 0.6 meter per year.
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CitationFilip, Gregory M.; Roth, Lewis F. 1987. Seven chemicals fail to protect Ponderosa pine from Armillaria root disease in central Washington. Res. Note PNW-RN-460. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 8 p
KeywordsRoot rot Armillaria, fungus control / prevention, ponderosa pine
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