by: marissa cheyne. spruce beetle (dendroctonus rufipennis) hosts- engelmann spruce, rarely lodge...
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Bark BeetlesBy: Marissa Cheyne
Spruce Beetle(Dendroctonus rufipennis)
Hosts- Engelmann spruce, rarely lodge pole pine
Attack Trees less than 12 inches diameter
Red-Brown boring dust on bark through Mid May- July
Red Turpentine Beetle(Dendroctonus valens)
Host: Ponderosa and lodge pole pine. Can infest any pine species
Beetle gallery
Largest & Weakest Trees are attacked: Trees also injured by fire, logging, and other damages
Very Large Red Pitch tubes
Western Pine Beetle(Dendroctonus brevicomis)
Host: Ponderosa Pine
Kills trees that are less than 6 inches
Mountain Pine Beetle(Dendrotonus
ponderosae)Hosts: All Native and introduced species of pines
Kills trees less than 5 inches
Douglas Fir Beetle
(Dendroctonus pseudotsugae)
Hosts: Douglas Fir, Western Larch
Attack trees less than 12 inches
Ambrosia Beetle(Trypodendron
spp)Hosts: True Firs, Spruce, Douglas Fir, Hemlock, Larch, Pine
Attacks tree that are weak, dying or recently cut
Works CitiedLeatherman, D.A.. ""Mountain Pine Beetle"." Colorado State
University. Colorado State University Extension, 3 2012. Web. 19 Nov 2012. <www.ext.colostate.edu>.
Seybold, S.J.. ""Bark Beetles"." UCIPM Online. UC ANR, 08 2012. Web. 14 Nov 2012. <www.ipm.ucdavis.edu>.
Hagle, Susan. "Bark Beetles and Wood Borders". Missoula, Montana: U.S. Department of Agriculture Forest Service, 1987. 34-45. Print.
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