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Biological studies of Eriosoma pyricola with particlar emphasis on morph production

Creator:: Mikesell, Janet May Smith
Abstract:: Various aspects of the biology of the woolly pear aphid Eriosoma pyricola were studied in order to further understand its annual cycle. It was already known that. E. pyricola produces alate sexuparae in response to the onset of dormancy in its secondary host, a pear. This study of E. pyricola...
Resource Type:: Masters Thesis
Full Text:: : Redacted for Privacy 'Professor K. G. Swenson Various aspects of the biology of the woolly pear aphid

The transmission of bean yellow mosaic virus by some strains of the aphid Myzus persicae (Sulzer)

Creator:: Carpenter, Gene Paul
Resource Type:: Masters Thesis
Full Text:: is due. First among these is Dr. K. G. Swenson to whom I am grateful for the help and patient

Use of petroleum oils to prevent spread of stylet-borne viruses by aphids

Creator:: Ascerno, Mark E.
Abstract:: The use of petroleum oil prevented, to varying degrees: the transmission of three stylet-borne viruses in three different crops. The use of oils resulted in a marked improvement in the number of lily bulbs harvested from treated plots as compared to the number of lily bulbs harvested from untreated plots....
Resource Type:: Masters Thesis
Full Text:: PREVENT SPREAD OF STYLET -BORNE VIRUSES BY APHIDS Abstract approved: Dr. K. G. Swenson The use of

Population development of Scutigerella immaculata (Newport), in laboratory and greenhouse cultures

Creator:: Ramsey, Henry Lee
Abstract:: Population development of the symphylan, Scutigerella immaculata (Newport), was studied in laboratory cultures. Also symphylan injury to greenhouse plants was investigated. Plastic polyethylene containers partly filled with damp ground hemlock bark were used to culture symphylan in the laboratory. Fresh lettuce food was supplied to the cultures weekly. Factors which...
Resource Type:: Masters Thesis
Full Text:: approved: IIIMME Dr. K. G. Swenson Population development of the symphylan, Scutigerella immacu- lata

Aphid transmission of an undescribed virus from sweet cherry

Creator:: Smith, Gordon Kent
Resource Type:: Masters Thesis
Full Text:: Dr. K. G. Swenson and found to transrnit this virus. Phytopathogenic viruses rnay be divided into

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:: Privacy Dr. K. G. Swenson The influence of oil sprays on the field spread of the aphid- borne bean

Induction of diapause in Colladonus montanus reductus (Van Duze)

Creator:: Marsh, Terrence George
Abstract:: Experiments conducted in the greenhouse showed that the leafhopper, Colladonus montanus reductus (Van Duzee), is a long-day insect. This conclusion is based on the production of diapausing eggs when the leafhoppers were kept under short days (ten hours) during the nymphal stage and the adult pre-oviposition period. Continuous development of...
Resource Type:: Masters Thesis
Full Text:: Dr. K. G. Swenson, Professor of Entomology, Oregon State University, for his guidance and criticism

Aphid transmission of three strains of cucumber mosaic virus

Creator:: Nelson, Robert Leroy
Resource Type:: Masters Thesis
Full Text:: G. SWenson, Aasociate Protesaor ot Entomology, throuah vhoae willing help and guidance the

Factors affecting the susceptibility of bean plants to inoculation with bean yellow mosaic virus

Creator:: Sohi, Sardara Singh
Resource Type:: Masters Thesis
Full Text:: tables I and 8. s, DcfLnlttonr $g,gu+SlttpTr {qgltEffi r,efera ts feedtns, pertod of, sphl.ds on the

Factors affecting the evaluation and use of grain protectants for insect control

Creator:: Tunnock, Archie
Resource Type:: Masters Thesis
Full Text:: Eros s The writer wishes to thank Dr. Knud G. Swenson, Associate Professor, Oregon State Coflege

ScholarsArchive@OSU

Biological studies of Eriosoma pyricola with particlar emphasis on morph production

The transmission of bean yellow mosaic virus by some strains of the aphid Myzus persicae (Sulzer)

Use of petroleum oils to prevent spread of stylet-borne viruses by aphids

Population development of Scutigerella immaculata (Newport), in laboratory and greenhouse cultures

Aphid transmission of an undescribed virus from sweet cherry

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

Induction of diapause in Colladonus montanus reductus (Van Duze)

Aphid transmission of three strains of cucumber mosaic virus

Factors affecting the susceptibility of bean plants to inoculation with bean yellow mosaic virus

Factors affecting the evaluation and use of grain protectants for insect control

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