Canadian Forest Service Publications

Susceptibility of western conifers to laminated root rot (Phellinus weirii) in Oregon and British Columbia field tests. 1993. Nelson, E.E.; Sturrock, R.N. Western Journal of Applied Forestry 8(2): 67-70.

Year: 1993

Issued by: Pacific Forestry Centre

Catalog ID: 3322

Language: English

Availability: PDF (request by e-mail)

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Several species of conifers were outplanted around infected stumps in Oregon and British Columbia to measure their susceptibility to laminated root rot caused by Phellinus weirii. Grand fir (Abies grandis) experienced nearly 30% mortality caused by P. weirii. Douglas-fir (Pseudotsuga menziesii) mortality exceeded 20%. Noble fir (A. procera), Sitka spruce (Picea sitchensis), giant sequoia (Sequoiadendron giganteum), western hemlock (Tsuga heterophylla), and ponderosa pine (Pinus ponderosa) mortality averaged less than 10%. Western white pine (P. monticola) and lodgepole pine (P. contorta) mortality was less than 1%. Phellinus weirii did not cause mortality of western redcedar (Thuja plicata) or redwood (Sequoia sempervirens). Apparent susceptibility, based on mortality over 17-20 growing seasons, was similar to that recorded in past field observations.