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Filtering by: Subject Lodgepole pine -- Diseases and pests -- Montana Academic Affiliation Entomology

Certain factors affecting colonization of Ponderosa pine by Ips confusus (Leconte) (Coleoptera : Scolytidae)

Creator:

Pitman, Gary Boyd

Abstract:

The purpose of this study was to study in some detail host factors which influence the population dynamics of bark beetle. The dissertation objectives were to ascertain the applicability of utilizing osmotic pressure values and relative turgidity values of phloem tissue as indicators which reflect upon the physiological profile of...

Resource Type:

Dissertation

Full Text:

pine of two o.e.p. categories, e.g., high and low, which were sampled at ten -foot intervals
Thelytokous and dioecious populations of Phenacaspis pinifoliae (Fitch), (Homoptera : Diaspididae)

Creator:

Stimmann, Michael W.

Abstract:

Two populations of the pine needle scale, Phenacaspis pinifoliae (Fitch), were studied. One population was located in Corvallis, Oregon, and the other population was located near Santiam Pass, Oregon. Both populations were feeding on Pinus contorta. The Corvallis population was unisexual, univoltine, and over wintered as both eggs and adult...

Resource Type:

Masters Thesis

Full Text:

Phenacaspis pinifoliae on "Scotch pine" in Saskatchewan, Canada. The population was bisexual and univoltine
Parasites and predators of Dendroctonus ponderosae Hopkins (Coleoptera : Scolytidae) in ponderosa pine

Creator:

Billings, Ronald F.

Abstract:

The bark beetle Dendroctonus ponderosae Hopkins (Coleoptera: Scolytidae) has caused severe mortality in recent decades to young stands of ponderosa pine in the western United States. Insect parasites and predators, believed to be of importance in the population dynamics of the beetle, were the subject of the thesis research, conducted...

Resource Type:

Masters Thesis