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A biological and developmental study of Coeloides brunneri Vier. : a parasite of the Douglas-fir beetle, Dendroctonus pseudotsugae Hopk.

Creator:: Ryan, Roger B.
Resource Type:: Dissertation

A chalcid parsite, Dinarmus acutus Thomson, of the vetch bruchid, Bruchus brachialis Fahraeus

Creator:: Leong, Kingston Lin Hoy, 1940-
Resource Type:: Dissertation
Full Text:: Period of Twelve Hours. 79 Table Page 12 Seasonal History of Hairy Vetch, Vicia villosa in Corvallis

A comparative study of the isozymic proteins and the effect of metachemogenesis in the tissues of Periplaneta americana (L.)

Creator:: Beckendorf, Gerald Walter
Abstract:: An attempt was made to demonstrate isozymic forms of esterase, MDH, LDH and GPDH and the variation in enzyme pattern with increasing age in the thoracic muscle, appendage muscle and hemolymph of the American cockroach, Periplaneta americana. Sampled specimens of both sexes were aged one through seven days, two weeks...
Resource Type:: Masters Thesis
Full Text:: specimen 79 b. six month old specimen 79 32 Photograph of female appendage muscle GPDH 81 gels. 33

A comparison of bumble bees (Bombus spp.) and honey bees (Apis mellifera) for the pollination of Oregon cranberries (Ericaceae: Vaccinium macrocarpon)

Creator:: Phillips, Kimberly N.
Abstract:: In cranberry (Vaccinium macrocarpon Aiton) cultivation, farmers typically rent colonies of honey bee (Apis mellifera) for pollination. However, the efficiency of this bee at pollinating cranberries in Oregon, as in other regions, is questionable. Bumble bees (Bombus sp.) are reportedly effective in other regions, but their impact in Oregon is...
Resource Type:: Masters Thesis
Full Text:: . Conservation and management of native bees in cranberry. Maine Agr. and Forest Expt. Sta. Tech. Bulletin

A contribution to the biology of the Pseudohylesinus nebulosus (LeConte) (Coleoptera:Scolytidae), especially in relation to the moisture stress of its host, Douglas-fir

Creator:: Stoszek, Karel Josef
Abstract:: The study (1) describes the life cycle of P. nebulosus, (2) examines stimuli that may cause the beetles to locate brood material, and (3) establishes the relationship between moisture stress in Douglas-fir and colonization by P. nebuZosus.and other meristem insects. (1) Development of P. nebulosus goes through the egg stage,...
Resource Type:: Dissertation
Full Text:: unispinosus relationships: 79 Threshold PMS indicative of tree condition conducive to colonization. 19

A model of trophic evolutionary pathways

Creator:: Morris, A. Kimo
Abstract:: Calow (1983) realized that differences between parasites and their free-living relatives can be explained by the differences in nutrient richness. I propose a model that is based on Calow's idea which identifies the relative position of different trophic strategies (e.g. predation, grazing, parasitism and others) based on (1) the differences...
Resource Type:: Masters Thesis

A model study of a plant-herbivore system

Creator:: Stimac, Jerry Lynn
Abstract:: The dynamics of tansy ragwort, Senecio jacobaea L. , and the cinnabar moth, Tyria jacobaeae (L.) were studied with the aid of a system simulation model. The model development and validation were based on knowledge of the plant and herbivore gathered from the literature, four years of data from previous...
Resource Type:: Dissertation
Full Text:: Defoliated at week 5 202 95 33 74 47.00 15.78 Defoliated at week 10 200 79 58 63 39.50 10.14 Defoliated at

A quantitative survey of the fleas associated with the gray-tailed vole, Microtus canicaudus Miller

Creator:: Robbins, Richard George
Abstract:: A study of the population dynamics and ecology of the fleas associated with the gray-tailed vole, Microtus canicaudus Miller, was conducted on three sites surrounding the city of Corvallis, Oregon. Over a period of 12 months, 22,641 adult and larval fleas representing three families and eight species were recovered from...
Resource Type:: Masters Thesis
Full Text:: frequency distribution of Catallagia charlottensis on 377 comparable voles. G = 0; truncated. 79 80 81

A review of Sitobion, with a description and revision of a new genus (Homoptera: Aphididae)

Creator:: Jensen, Andrew S.
Resource Type:: Dissertation

A review of the family Eviphididae (Acarina: Mesostigmata)

Creator:: Shoemake, Rodger Russell
Abstract:: A complete taxonomic review of the Family Eviphididae was made for the first time. The family was found to contain forty-nine species and five genera. The genera included were: Eviphis Berlese, Scarabaspis Womersley, Alliphis Halbert, Pelethiphis Berlese, and Thinoseius Halbert. The new species described were: Eviphis oregonensis from Deschutes County,...
Resource Type:: Dissertation
Full Text:: Species Incertae sedis 79 Genus Scarabaspis Womersley 80 Diagnosis 81 Key to Species of the Genus

ScholarsArchive@OSU

A biological and developmental study of Coeloides brunneri Vier. : a parasite of the Douglas-fir beetle, Dendroctonus pseudotsugae Hopk.

A chalcid parsite, Dinarmus acutus Thomson, of the vetch bruchid, Bruchus brachialis Fahraeus

A comparative study of the isozymic proteins and the effect of metachemogenesis in the tissues of Periplaneta americana (L.)

A comparison of bumble bees (Bombus spp.) and honey bees (Apis mellifera) for the pollination of Oregon cranberries (Ericaceae: Vaccinium macrocarpon)

A contribution to the biology of the Pseudohylesinus nebulosus (LeConte) (Coleoptera:Scolytidae), especially in relation to the moisture stress of its host, Douglas-fir

A model of trophic evolutionary pathways

A model study of a plant-herbivore system

A quantitative survey of the fleas associated with the gray-tailed vole, Microtus canicaudus Miller

A review of Sitobion, with a description and revision of a new genus (Homoptera: Aphididae)

A review of the family Eviphididae (Acarina: Mesostigmata)

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