Index Catalog // ScholarsArchive@OSU

Characteristics of Typhlodromus americanus Chant and Yoshida-Shaul (Acari: phytoseiidae) as a biological control agent of Oligonychus ununguis (Jacobi) (Acari: tetranychidae)

Creator:: Horton, Rene N.
Abstract:: The life history, temperature, humidity, and feeding requirements of the phytoseiid predator mite, Typhlodromus americanus Chant and Yoshida-Shaul were tested in the laboratory. Occurance of the mite in the field during different times of the year was investigated as well. Effects of temperature and humidity on egg hatch, the feeding...
Resource Type:: Masters Thesis
Full Text:: : Tetranychidae). Abstract approved: Jack DeAngelis The life history, temperature, humidity, and feeding

Biology and management of a mushroom-infesting sciarid fly (Diptera: Sciaridae) in relation to room-to-room dispersal

Creator:: Mehelis, Christopher N.
Abstract:: The purpose of this research is two fold. First to improve pest management of the sciarid fly (Diptera: Sciaridae) by better defining its relation to mushroom production. Secondly, to explore some of the factors and aspects of the biology of the fly which may increase room to room dispersal rates...
Resource Type:: Masters Thesis
Full Text:: . Abstract approved Jack DeAngelis The purpose of this research is two fold. First to improve pest

Seasonal abundance, distribution, and migration of the clover aphid, Nearctaphis bakeri (Cowen) in red clover

Creator:: Dreves, Amy J.
Abstract:: Four sampling techniques were evaluated to estimate clover aphid, Nearctaphis bakeri (Cowen), abundance in red clover fields in the Willamette Valley. The Berlese funnel method detected one to four times more aphids than other sampling techniques. Visual assessment often underestimated the high aphid densities during the flowering and seeding of...
Resource Type:: Masters Thesis
Full Text:: Redacted for Privacy Abstract approved:\ Jack DeAngelis Four sampling techniques were evaluated to

Transmission efficiency and life table parameters of western flower thrips, Frankliniella occidentalis (Pergande) exposed to tomato spotted wilt virus-impatiens serotype

Creator:: Sether, Diane M.
Abstract:: Peppermint, Mentha piperita 'Black Mitcham' was established as a host for tomato spotted wilt virus-impatiens serotype (TSWV-I). TSWV-I infection of peppermint, initially observed in a research greenhouse (Corvallis, OR), included stunting and downward curling of leaves accompanied by bronzing, and occasionally tip necrosis. Young leaves appeared either symptomless, deformed, or...
Resource Type:: Masters Thesis
Full Text:: professors, Dr. Jack DeAngelis and Dr. Phil Rossignol. Without their encouragement, financial support and

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:: approved. Redacted for Privacy Abstract approved_ Jack DeAngelis Redacted for Privacy I/Glenn Fisher

Effects of Tetranychus urticae Koch feeding injury on physiological processes in Mentha piperita L.

Creator:: DeAngelis, Jack D.
Abstract:: Studies were conducted to examine the effects of feeding injury by the twospotted spider mite (Tetranychus urticae Koch) on physiological processes of its host plant, peppermint (Mentha piperita L.). Aspects of mite-induced host plant physiological stress that were studied included: 1) effects of injury on plant-water relations; 2) photosynthesis and...
Resource Type:: Dissertation
Full Text:: Physiological Processes in Mentha piperita L. AN ABSTRACT OF THE THESIS OF Jack Douglas DeAngelis for the

The effects of nitrogen manipulations and hydrology on the establishment and competitive abilities of wetland prairie plant species (western Oregon)

Creator:: Davis, Kimberly J.
Abstract:: Many studies suggest that weedy plant species are most successful when soil nitrogen in abundant. Consequently, I used soil nitrogen manipulations to determine if altering nitrogen would affect the establishment of both weedy and native plant species in a western Oregon wetland prairie. In two studies, we added carbon amendments...
Resource Type:: Dissertation
Full Text:: members, Kate Lajtha, Don Zobel, David Myrold, Jeff Steiner, and Jack DeAngelis for their valuable

Biological control of spider mites by the predatory mite Neoseiulus fallacis (Acari: Phytoseiidae) in ornamental nursery systems

Creator:: Pratt, Paul D.
Abstract:: We identified and evaluated a phytoseiid predator as a biological control agent of multiple spider mites pests that occur in ornamental nurseries. When comparing species, Neoseiulus fallacis (Garman) had a wider prey range than Galendromus occidentalis (Nesbitt), a higher probability of overwintering than Neoseiulus califomicus McGregor and was equally or...
Resource Type:: Dissertation
Full Text:: committee members, Jack DeAngelis, Jim Green, Marcos Kogan and William Proebsting were always generous

Biology and control of Douglas-fir needle midge in Christmas trees

Creator:: Oregon State University. Extension Service and DeAngelis, Jack D.
Abstract:: The Douglas-fir needle midge can be a very destructive pest of Douglas-fir. Infestation of new needles can be as high as 100 per-cent. Severe infestations can cause intolerable needle loss, and trees may take several years to recover. Needle loss is an especially serious problem in Christmas trees because of...
Resource Type:: Technical Report
Full Text:: dates will vary year to year. Figure 2.—Adult female midge. Jack D. DeAngelis, Extension entomolo

Aphid and adelgid pests of conifers in Oregon

Creator:: DeAngelis, Jack D. and Oregon State University. Extension Service
Abstract:: This publication covers the important aphid and adelgid pests of conifers in Oregon, excluding those that primarily feed on the roots of their host.
Resource Type:: Technical Report
Full Text:: . The wax provides protection against Jack D. DeAngelis, Extension entomologist, Oregon State

ScholarsArchive@OSU

Characteristics of Typhlodromus americanus Chant and Yoshida-Shaul (Acari: phytoseiidae) as a biological control agent of Oligonychus ununguis (Jacobi) (Acari: tetranychidae)

Biology and management of a mushroom-infesting sciarid fly (Diptera: Sciaridae) in relation to room-to-room dispersal

Seasonal abundance, distribution, and migration of the clover aphid, Nearctaphis bakeri (Cowen) in red clover

Transmission efficiency and life table parameters of western flower thrips, Frankliniella occidentalis (Pergande) exposed to tomato spotted wilt virus-impatiens serotype

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

Effects of Tetranychus urticae Koch feeding injury on physiological processes in Mentha piperita L.

The effects of nitrogen manipulations and hydrology on the establishment and competitive abilities of wetland prairie plant species (western Oregon)

Biological control of spider mites by the predatory mite Neoseiulus fallacis (Acari: Phytoseiidae) in ornamental nursery systems

Biology and control of Douglas-fir needle midge in Christmas trees

Aphid and adelgid pests of conifers in Oregon

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