Environmental Entomology (1983) 12, 1447-1448

Frank G. Hawksworth, C. Kendall Lister and Donn B. Cahill (1983)
Phloem thickness in lodgepole pine: its relationship to dwarf mistletoe and mountain pine beetle (Coleoptera: Scolytidae)
Environmental Entomology 12 (5), 1447-1448
Abstract: A generally accepted hypothesis is that lodgepole pines infected by dwarf mistletoe, Arceuthobium americanum, are less susceptible to mountain pine beetle, Dendroctonus ponderosae, because they have thinner phloem than uninfected trees. This Colorado study, based on 1,051 trees, indicates that there is little relationship between dwarf mistletoe intensity and phloem thickness. Therefore, we conclude that there is little correlation between dwarf mistletoe and mountain pine beetle activity, at least in Colorado.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)

Research topic(s) for pests/diseases/weeds:
environment - cropping system/rotation
surveys/sampling/distribution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Dendroctonus ponderosae	Pine (Pinus)	U.S.A. (SW)
	Arceuthobium americanum (weed)	Pine (Pinus)	U.S.A. (SW)