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Effects of controlled flow reductions on the insect community of an Oregon coastal stream

Creator:: Hafele, Richard E.
Abstract:: Controlled flow reductions of 75% apportioned over four two-week intervals were studied during the summers of 1975 and 1976 on the North Fork of Elk Creek, an Oregon coastal stream. The effects of reduced flows on invertebrate drift, insect benthos, and the available food for juvenile salmonids were measured. Invertebrate...
Resource Type:: Masters Thesis
Full Text:: REDUCTIONS ON THE INSECT COMMUNITY OF AN OREGON COASTAL STREAM Abstract approved: Redacted for Privacy N

Insect pests affecting clover in Oregon

Creator:: Anderson, Ernest Clifford
Resource Type:: Masters Thesis
Full Text:: the Willaxnette Valley this insect is responsible for the fact that as a general rule more than

Oil sprays to prevent the spread of bean yellow mosaic virus (BYMV) by aphids

Creator:: Vargas, Timothy Carl
Abstract:: The influence of oil sprays on the field spread of the aphid-borne bean yellow mosaic virus (BYMV) in bean was studied in 1972 and 1973. Oil sprays failed to significantly reduce virus spread in the 1972 BYMV experiment. However, the data did suggest that the efficiency of the oil sprays...
Resource Type:: Masters Thesis
Full Text:: cylinder con- taining the insect catch was placed in an ethyl acetate kill chamber for 5 minutes. The

Insect enemies of Dendroctonus pseudotsugae Hopk. : indentification of their immature stages and distribution in standing trees

Creator:: Kline, LeRoy N.
Abstract:: The objectives undertaken in this study were: 1) to develop means of identifying the immature stages of the known insect predators and parasites of the Douglas-fir beetle; 2) to investigate the possible distribution, spatially and/or temporal, of the known insect predators and parasites in standing trees infested by the Douglas-fir...
Resource Type:: Masters Thesis
Full Text:: Insect enemies of Dendroctonus pseudotsugae Hopk

Control of mint root borer, Fumibotys fumalis, with the entomopathogenic nematode, Steinernema carpocapsae

Creator:: Takeyasu, Joyce
Resource Type:: Masters Thesis
Full Text:: the insect is usually targeted since it causes direct damage to the crop. For lepidopteran larvae

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:: tetrads by insect visitation for sufficient fruit set (Eck, 1990; Cane and Schiffhauer, 2003; Brown

Distribution of Oligonychus (Oligonychus) ununguis (Jacobi) (Acari: Tetranychidae) and predator mite species (Acair: Phytoseiidae) on field-grown Douglas-fir (Pseudotsuga menziesii [Mirb] Franco) Christmas trees

Creator:: Calkin, James D.
Abstract:: The shake and wash technique (samples placed in a jar with alcohol added and shaken to remove the mites) was effective in removing 100% of the predator mites, and adult spruce spider mites from Douglas-fir foliage and 98% of the spruce spider mite nymphs. Eighty-eight percent of the spruce spider...
Resource Type:: Masters Thesis
Full Text:: thank Dr. Ralph Berry for his direction, support, and advice that he has given me. I thank Dr. Glenn

Trace metal concentrations in the signal crayfish, Pacifastacus leniusculus (Decapoda: Astacidae), and the stonefly Pteronarcys californica (Plecoptera: Pteronarcyidae) along a downstream gradient of the Umatilla River

Creator:: Snyder, Jennifer L.
Abstract:: Metals are a persistent form of freshwater pollution and have been shown to bioaccumulate in aquatic macroinvertebrates through direct contact with contaminated water, sediments, and through consumption of contaminated organisms. This research explored the longitudinal bioaccumulation patterns of 5 common trace metals (Cr, Cu, Zn, Cd, and Pb) in the...
Resource Type:: Masters Thesis
Full Text:: ). Likewise, body size has been shown to account for differences in metal concentrations in aquatic insects

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
Full Text:: Donald Quicke also had influence in the direction of this thesis, and I am grateful to them for their

A revision of the North American species of Pactopus Leconte and Trixagus Kugelann (Coleoptera: Throscidae)

Creator:: Yensen, Arthur Eric
Abstract:: This study was undertaken to find means of separating the morphologically similar species of North American Trixagus and to bring together information on Trixagus and Pactopus. A key to separate the world's eight genera of extant Throscidae is presented for the first time. A key to the five species of...
Resource Type:: Masters Thesis
Full Text:: grateful to M. Prof. A. Balachowsky for sending me the types of species described by Bonvouloir from the

ScholarsArchive@OSU

Effects of controlled flow reductions on the insect community of an Oregon coastal stream

Insect pests affecting clover in Oregon

Oil sprays to prevent the spread of bean yellow mosaic virus (BYMV) by aphids

Insect enemies of Dendroctonus pseudotsugae Hopk. : indentification of their immature stages and distribution in standing trees

Control of mint root borer, Fumibotys fumalis, with the entomopathogenic nematode, Steinernema carpocapsae

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

Distribution of Oligonychus (Oligonychus) ununguis (Jacobi) (Acari: Tetranychidae) and predator mite species (Acair: Phytoseiidae) on field-grown Douglas-fir (Pseudotsuga menziesii [Mirb] Franco) Christmas trees

Trace metal concentrations in the signal crayfish, Pacifastacus leniusculus (Decapoda: Astacidae), and the stonefly Pteronarcys californica (Plecoptera: Pteronarcyidae) along a downstream gradient of the Umatilla River

A model of trophic evolutionary pathways

A revision of the North American species of Pactopus Leconte and Trixagus Kugelann (Coleoptera: Throscidae)

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