TY - JOUR
T1 - Comparative susceptibility of conifers to western hemlock dwarf mistletoe in the cascade mountains of Washington and Oregon
AU - Mathiasen, Robert L.
AU - Daugherty, Carolyn M.
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2005/4
Y1 - 2005/4
N2 - A total of 24 mixed conifer stands in Washington and Oregon infested with western hemlock dwarf mistletoe (Arceuthobium tsugense subsp. tsugense) were sampled to compare host susceptibility to this parasitic plant. Temporary circular plots were established around dominant, severely infected western hemlocks (Tsuga heterophylla). Within plots, species, diameter at breast height, and dwarf mistletoe rating (6-class system) were determined for each live tree. More than 5,700 trees were sampled in 275 plots. Based on the incidence of infection, tree species were assigned to host susceptibility classes. Western hemlock is classified as the only principal host of western hemlock dwarf mistletoe. Pacific silver fir (Abies amabilis), noble fir (Abies procera), and mountain hemlock (Tsuga mertensiana) are classified as occasional hosts. Resource managers can use the host susceptibility classifications based on this study for decisions regarding which trees to retain when selectively harvesting mixed conifer stands infested with western hemlock dwarf mistletoe in the Pacific Northwest.
AB - A total of 24 mixed conifer stands in Washington and Oregon infested with western hemlock dwarf mistletoe (Arceuthobium tsugense subsp. tsugense) were sampled to compare host susceptibility to this parasitic plant. Temporary circular plots were established around dominant, severely infected western hemlocks (Tsuga heterophylla). Within plots, species, diameter at breast height, and dwarf mistletoe rating (6-class system) were determined for each live tree. More than 5,700 trees were sampled in 275 plots. Based on the incidence of infection, tree species were assigned to host susceptibility classes. Western hemlock is classified as the only principal host of western hemlock dwarf mistletoe. Pacific silver fir (Abies amabilis), noble fir (Abies procera), and mountain hemlock (Tsuga mertensiana) are classified as occasional hosts. Resource managers can use the host susceptibility classifications based on this study for decisions regarding which trees to retain when selectively harvesting mixed conifer stands infested with western hemlock dwarf mistletoe in the Pacific Northwest.
KW - Abies amabilis
KW - Arceuthobium tsugense
KW - Host susceptibility
KW - Tsuga heterophylla
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U2 - 10.1093/wjaf/20.2.94
DO - 10.1093/wjaf/20.2.94
M3 - Article
AN - SCOPUS:19044366910
SN - 0885-6095
VL - 20
SP - 94
EP - 100
JO - Western Journal of Applied Forestry
JF - Western Journal of Applied Forestry
IS - 2
ER -