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Seasonal activities of two species of eriophyid mites on holly and their relation to foliage damage

Creator:: Welton, Richard Elroy
Resource Type:: Masters Thesis
Full Text:: thesis. To Dr. G. '. (rantz, Associate Professor of tomoloy, and Mr. J. D. Lattin, Assistant

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

Photoperiodic control of development in the leafhopper, Agalliopsis abietaria Oman

Creator:: Brown, Robert David
Abstract:: Photoperiod controls the duration of both the fourth and fifth stadia in Agalliopsis abietaria Oman. Development was arrested in the fourth stadium unless short days were given during the second and third instars; a short arrest of development occurred if the short days did not begin until the fourth instar....
Resource Type:: Masters Thesis
Full Text:: helped me in the completion of this study, especially: Dr. K. G. Swenson, for his guidance and valuable

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

Factors affecting aphid transmission of bean yellow mosaic virus

Creator:: Adlerz, W. C. (Warren Clifford)
Resource Type:: Dissertation
Full Text:: )inadons of 3ource 1ants and test plants on transmission of bean yellow mosaic virus by lyzus d J Ç '7

Aphid transmission of an undescribed virus from sweet cherry

Creator:: Smith, Gordon Kent
Resource Type:: Masters Thesis
Full Text:: . Swenson, Professor of Entornology, oregon state university, for his he1p, guidance, and encouragernent

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

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:: -inoculation tempera- tures wetre not additive " The number of plants infected depended entirely on post-,'j

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

Environmental biology of Eriosoma pyricola Baker and Davidson

Creator:: Sethi, Satnam Lal
Abstract:: A method of culturing Eriosoma pyricola on detached root pieces was developed to ensure a regular supply of aphids for experimental work. Another method was designed for studying the alate sexuparae formation in woolly pear aphid, whereby growing plants were infested so that the aphids or their progeny could be...
Resource Type:: Dissertation
Full Text:: ERIOSOMA PYRICOLA BAKER AND DAVIDSON Abstract approved: K. G. Swenson A method of culturing Eriosoma

ScholarsArchive@OSU

Seasonal activities of two species of eriophyid mites on holly and their relation to foliage damage

Aphid transmission of three strains of cucumber mosaic virus

Photoperiodic control of development in the leafhopper, Agalliopsis abietaria Oman

Induction of diapause in Colladonus montanus reductus (Van Duze)

Factors affecting aphid transmission of bean yellow mosaic virus

Aphid transmission of an undescribed virus from sweet cherry

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

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

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

Environmental biology of Eriosoma pyricola Baker and Davidson

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