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Some factors in the development of northwestern entomology

Creator:: Bonnell, Daniel Ernest
Resource Type:: Dissertation
Full Text:: . given. It was listed only for 1923-24.) l930-193. - Zool. 9 Advarç Entomolo- - A course in Insect

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

Spatial patterns of predaceous and phytophagous apple mites (Acari : Eriophyidae, phytoseiidae, Stigmaeidae, Tetranychidae) : intra- and interspecific relationships

Creator:: Slone, Daniel H.
Abstract:: Aggregation and species association of 9 species of phytophagous and predaceous mites were studied for 6 yr in an orchard with 100, 2 m tall 'Red Delicious' apple trees. To quantify aggregation, a method was developed that is powerful, and easily interpreted. It relates the proportion of habitat occupied to...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF Daniel H. Slone for the degree of Doctor of Philosophy in Entomology

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

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
Full Text:: these overwintered insects continues for about thzee weeks, althou:rh by the end of thC first zeek of

The biology of the balsam woolly aphid, Chermes piceae Ratz., in Oregon and Washington and the identification and evaluation of its native predators

Creator:: Mitchell, Russel Gene
Resource Type:: Dissertation
Full Text:: , It was found at Green River, for instance, that insects on one tree located along a cutting line

Developmental biology and phenology of the walnut husk fly, Rhagoletis completa Cresson (Diptera: Tephritidae) in the Willamette Valley of Oregon

Creator:: Kasana, Abdulmajid
Resource Type:: Dissertation
Full Text:: . 1979, Anonymous 1982). Six insects and one mite pest are responsible for walnut injury in the Pacific

Entomopathogenic nematodes for biological control of the Colorado potato beetle, Leptinotarsa decemlineata (Say)

Creator:: Armer, Christine Andrea
Abstract:: The Colorado potato beetle (CPB), Leptinotarsa decemlineata (Say), is the most devastating foliage-feeding pest of potatoes in the United States. Potential biological control agents include the nematodes Heterorhabditis marelatus Liu & Berry and Steinernema riobrave Cabanillas, Poinar & Raulston, which provided nearly 100% CPB control in previous laboratory trials. In...
Resource Type:: Dissertation
Full Text:: antibiosis for feeding insects (Sanford et al., 1984). Trichome-mediated resistance in wild potatoes

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

ScholarsArchive@OSU

Some factors in the development of northwestern entomology

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

Insect pests affecting clover in Oregon

Spatial patterns of predaceous and phytophagous apple mites (Acari : Eriophyidae, phytoseiidae, Stigmaeidae, Tetranychidae) : intra- and interspecific relationships

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

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

The biology of the balsam woolly aphid, Chermes piceae Ratz., in Oregon and Washington and the identification and evaluation of its native predators

Developmental biology and phenology of the walnut husk fly, Rhagoletis completa Cresson (Diptera: Tephritidae) in the Willamette Valley of Oregon

Entomopathogenic nematodes for biological control of the Colorado potato beetle, Leptinotarsa decemlineata (Say)

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

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