Abstract
Seventeen mixed conifer stands infested with knobcone pine dwarf mistletoe (Arceuthobium siskiyouense) were sampled to evaluate host susceptibility to this parasitic plant. Temporary circular plots (radius 6 m) were established around dominant, severely infected knobcone pines (Pinus attenuata). Within plots, species, diameter at breast height, and dwarf mistletoe rating (6-class system) were determined for each live tree taller than 1.4 m. More than 2000 trees were sampled in 140 plots. Based on the incidence of infection, tree species were assigned to host-susceptibility classes. Although Jeffrey pine (Pinus jeffreyi) and shore pine (Pinus contorta var. contorta) have been classified as rare hosts of knobcone pine dwarf mistletoe, my results suggest that Jeffrey pine should be classified as a principal host and shore pine should be classified as an occasional host. No infection was observed on western white pine (Pinus monticola), Douglas-fir (Pseudotsuga menziesii), or incense-cedar (Calocedrus decurrens), indicating that these species should be classified as immune.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 42-48 |
| Number of pages | 7 |
| Journal | Western North American Naturalist |
| Volume | 69 |
| Issue number | 1 |
| DOIs | |
| State | Published - 2009 |
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Keywords
- Arceuthobium siskiyouense
- Host susceptibility
- Pinus attenuata
- Pinus contorta var. contorta
- Pinus jeffreyi
ASJC Scopus subject areas
- Ecology, Evolution, Behavior and Systematics
- Ecology
Cite this
Comparative susceptibility of conifers to knobcone pine dwarf mistletoe. / Mathiasen, Robert L.
In: Western North American Naturalist, Vol. 69, No. 1, 2009, p. 42-48.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Comparative susceptibility of conifers to knobcone pine dwarf mistletoe
AU - Mathiasen, Robert L
PY - 2009
Y1 - 2009
N2 - Seventeen mixed conifer stands infested with knobcone pine dwarf mistletoe (Arceuthobium siskiyouense) were sampled to evaluate host susceptibility to this parasitic plant. Temporary circular plots (radius 6 m) were established around dominant, severely infected knobcone pines (Pinus attenuata). Within plots, species, diameter at breast height, and dwarf mistletoe rating (6-class system) were determined for each live tree taller than 1.4 m. More than 2000 trees were sampled in 140 plots. Based on the incidence of infection, tree species were assigned to host-susceptibility classes. Although Jeffrey pine (Pinus jeffreyi) and shore pine (Pinus contorta var. contorta) have been classified as rare hosts of knobcone pine dwarf mistletoe, my results suggest that Jeffrey pine should be classified as a principal host and shore pine should be classified as an occasional host. No infection was observed on western white pine (Pinus monticola), Douglas-fir (Pseudotsuga menziesii), or incense-cedar (Calocedrus decurrens), indicating that these species should be classified as immune.
AB - Seventeen mixed conifer stands infested with knobcone pine dwarf mistletoe (Arceuthobium siskiyouense) were sampled to evaluate host susceptibility to this parasitic plant. Temporary circular plots (radius 6 m) were established around dominant, severely infected knobcone pines (Pinus attenuata). Within plots, species, diameter at breast height, and dwarf mistletoe rating (6-class system) were determined for each live tree taller than 1.4 m. More than 2000 trees were sampled in 140 plots. Based on the incidence of infection, tree species were assigned to host-susceptibility classes. Although Jeffrey pine (Pinus jeffreyi) and shore pine (Pinus contorta var. contorta) have been classified as rare hosts of knobcone pine dwarf mistletoe, my results suggest that Jeffrey pine should be classified as a principal host and shore pine should be classified as an occasional host. No infection was observed on western white pine (Pinus monticola), Douglas-fir (Pseudotsuga menziesii), or incense-cedar (Calocedrus decurrens), indicating that these species should be classified as immune.
KW - Arceuthobium siskiyouense
KW - Host susceptibility
KW - Pinus attenuata
KW - Pinus contorta var. contorta
KW - Pinus jeffreyi
UR - http://www.scopus.com/inward/record.url?scp=66949176661&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=66949176661&partnerID=8YFLogxK
U2 - 10.3398/064.069.0114
DO - 10.3398/064.069.0114
M3 - Article
VL - 69
SP - 42
EP - 48
JO - Western North American Naturalist
JF - Western North American Naturalist
SN - 1527-0904
IS - 1
ER -