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Biology studies of Macrosiphum avenae (Fabr.), Acyrthosiphon dirhodum (Walker), and Rhopalosiphum padi (L.) on Gramineae in western Oregon

Creator:: Greene, Gerald L.
Abstract:: Field biology studies of three grain aphids, Macrosiphum avenae (Fabr.), Acyrthosiphon dirhodum (Walker), and Rhopalosiphum padi (L.) were conducted near Corvallis, Oregon, from 1961 to 1964. Populations of M. avenae were found on grain plants, and alatae entering spring barley may have been from wheat fields. Specimens were found more...
Resource Type:: Dissertation
Full Text:: . Since the description of the disease in 1951 by Oswald and Huston (68) it has been reported to damage

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:: holly and their relation to foliage damage SEASONAL ACTIVITIES OF TWO SPECIES OF ERIOPHYID MITES ON

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:: ). 'l'here, and subsequently in New England; it became a serious pest on balsam fir, !· balsamea (L

Certain factors affecting colonization of Ponderosa pine by Ips confusus (Leconte) (Coleoptera : Scolytidae)

Creator:: Pitman, Gary Boyd
Abstract:: The purpose of this study was to study in some detail host factors which influence the population dynamics of bark beetle. The dissertation objectives were to ascertain the applicability of utilizing osmotic pressure values and relative turgidity values of phloem tissue as indicators which reflect upon the physiological profile of...
Resource Type:: Dissertation
Full Text:: to ascer- tain the applicability of utilizing osmotic pressure values and relative turgidity

Thelytokous and dioecious populations of Phenacaspis pinifoliae (Fitch), (Homoptera : Diaspididae)

Creator:: Stimmann, Michael W.
Abstract:: Two populations of the pine needle scale, Phenacaspis pinifoliae (Fitch), were studied. One population was located in Corvallis, Oregon, and the other population was located near Santiam Pass, Oregon. Both populations were feeding on Pinus contorta. The Corvallis population was unisexual, univoltine, and over wintered as both eggs and adult...
Resource Type:: Masters Thesis
Full Text:: Thelytokous and dioecious populations of Phenacaspis

Aphid transmission of an undescribed virus from sweet cherry

Creator:: Smith, Gordon Kent
Resource Type:: Masters Thesis
Full Text:: transrnission of a Annals of Applied Biology Brierley, P. and F. F. Srnith. Studies on lily virus disease: the

Ecology of mites on pomaceous fruit trees and related wild hosts in Hood River Valley

Creator:: Jorgensen, Clive Darrel
Abstract:: The ecological interrelationships of mites occurring in and near the Hood River Valley, Oregon, pome fruit orchards were investigated to determine the possibility of an integrated control program using the species already present. Survey sampling methods were used to study mites on wild hosts (Crataegus douglasii Lindl., Crataegus columbiana Howell,...
Resource Type:: Dissertation
Full Text:: - phytopha- gous. Pest species (Panonychus ulmi and Bryobia arborea) were abundant on wild host plots

A study of relationships of four insects to heating in stored grain

Creator:: Eighme, Lloyd Elwyn
Abstract:: This study was conducted to determine the effects of insect infestation on areas of heating in stored grain, and to demonstrate the ability of four species of insects to initiate or promote the spread of these heating areas. The four insects used were the granary weevil Sitophilus granarius (L.), the...
Resource Type:: Dissertation
Full Text:: the Pest Infestation Laboratory in England, (Howe 1943; Ox- ley and Howe 1944), he formulated 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:: of Brtsmology, tregon $tate Unlverslty, fon the helpr guldance and eneourageuent durLng thege

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:: LITERATURE While working with the leafhopper, Cicadulina mbila Naude, and the streak disease of maize

ScholarsArchive@OSU

Biology studies of Macrosiphum avenae (Fabr.), Acyrthosiphon dirhodum (Walker), and Rhopalosiphum padi (L.) on Gramineae in western Oregon

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

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

Certain factors affecting colonization of Ponderosa pine by Ips confusus (Leconte) (Coleoptera : Scolytidae)

Thelytokous and dioecious populations of Phenacaspis pinifoliae (Fitch), (Homoptera : Diaspididae)

Aphid transmission of an undescribed virus from sweet cherry

Ecology of mites on pomaceous fruit trees and related wild hosts in Hood River Valley

A study of relationships of four insects to heating in stored grain

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

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

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