Seven chemicals fail to protect Ponderosa pine from Armillaria root disease in central Washington.

Gregory M. Filip; Lewis F. Roth

doi:10.2737/PNW-RN-460

Treesearch

Seven chemicals fail to protect Ponderosa pine from Armillaria root disease in central Washington.

Informally Refereed

Authors:

Gregory M. Filip, Lewis F. Roth

Year:

1987

Type:

Research Note

Station:

Pacific Northwest Research Station

DOI:

https://doi.org/10.2737/PNW-RN-460

Source:

Res. Note PNW-RN-460. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 8 p

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Abstract

Chemicals 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.

Keywords

Root rot Armillaria, fungus control / prevention, ponderosa pine

Citation

Filip, 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