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Environmental biology of Endria inimica (Say) (Homoptera:Homoptera:Cicadellidae)

Creator:: Gustin, Ralph Donald
Abstract:: The leafhopper vector, Endria inimica (Say), of wheat striate mosaic virus is a bivoltine insect which overwinters as second generation eggs in a state of diapause. Under experimental conditions, egg diapause resulted from rearing females under short days (12L:12D) and diapause was averted by rearing females under long days (15L:9D)....
Resource Type:: Dissertation
Full Text:: ) (Cicadellidae: Homoptera) Redacted for Privacy Abstract approved: K. G. Swenson The leafhopper vector

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

Effects of intrinsic factors in the transmission of bean yellow mosaic virus by aphids

Creator:: Sohi, Sardara Singh
Abstract:: The effects of the inherent transmissibility of the virus and of the inherent transmitting ability of aphids on the transmission of bean yellow mosaic virus (BYMV) were studied along with four virus-vector relationships of BYMV and the green peach aphid, Myzus persicae (Sulz.). In addition, investigations were made on the...
Resource Type:: Dissertation
Full Text:: appreciation to Dr. K. G. Swenson, Professor of Entornology, for his constant encouragement, guidance and

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

Susceptibility of peas to aphid inoculation with bean yellow mosaic virus

Creator:: Welton, R. E. (Richard Elroy)
Abstract:: The effects of soil moisture, mineral nutrition and temperature on the susceptibility of peas to inoculation with bean yellow mosaic virus (BYMV) by the green peach aphid, Myzus persicae (Sulz.) were investigated along with three vector-virus relationships. In addition, a comparative study was made of two methods of evaluating susceptibility...
Resource Type:: Dissertation
Full Text:: . K. G. Swenson, Professor of Entomology, Oregon State University, for his direction, advice and

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

Factors affecting aphid transmission of bean yellow mosaic virus

Creator:: Adlerz, W. C. (Warren Clifford)
Resource Type:: Dissertation
Full Text:: for the help and uidance of Dr. K .G. Swenson, Associate Professor in the Agricultural Experiment

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

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

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

ScholarsArchive@OSU

Environmental biology of Endria inimica (Say) (Homoptera:Homoptera:Cicadellidae)

Biological studies of Eriosoma pyricola with particlar emphasis on morph production

Effects of intrinsic factors in the transmission of bean yellow mosaic virus by aphids

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

Susceptibility of peas to aphid inoculation with bean yellow mosaic virus

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

Factors affecting aphid transmission of bean yellow mosaic virus

Aphid transmission of an undescribed virus from sweet cherry

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

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

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