Index Catalog // ScholarsArchive@OSU

The biology and control of the insect vectors of potato viruses in Oregon

Creator:: Crumb, S. E. (Samuel Ebb)
Resource Type:: Dissertation
Full Text:: project. He has grown the tuber samples from insecticide plots and determined the amount of disease

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

Biology of some Oregon rain bettles, Pleocoma spp., associated with fruit trees in Wasco and Hood River counties

Creator:: Ellertson, Floyd Elroy
Resource Type:: Dissertation
Full Text:: ., associated with fruit trees in Wasco and Hood River counties BIOLOGY OF SOtE OREGON RAIN B TLES , PLEOCO

Population dynamics of the Douglas-fir cone moth, Barbara colfaciana (Kft.) (Lepidoptera:Olethreutidae)

Creator:: Nebeker, T. Evan
Abstract:: A population of the Douglas-fir cone moth, Barbara colfaxiana (Kft. ), was studied on the Buckhead Seed Production Area, Oakridge, Oregon, during 1971 and 1972. A method of estimating cone and insect populations is presented. Factors contributing to the mortality of B. colfaxiana are discussed, with resinosis being the critical...
Resource Type:: Dissertation
Full Text:: by an un- identified disease. The larvae were black and the body cavity was filled with a fluid

The root insect-- black-stain root disease association in Douglas-fir : vector relationships and implications for forest management

Creator:: Witcosky, Jeffrey John
Abstract:: Verticicladiella wageneri Kendrick is a vascular wilt pathogen of conifers, causing a black staining of colonized sapwood of roots and lower stem. In Douglas-fir, V. wageneri is intimately associated with insects. Hylastes nigrinus, Pissodes fasciatus, and Steremnuis carinatus are commonly associated with diseased hosts, carry inoculum of V. wageneri in...
Resource Type:: Dissertation

The western oak bark beetle, Pseudopityophthorus pubinpennis (Lec.), in the central Willamette Valley of Oregon

Creator:: Dobson, Richard Cecil
Resource Type:: Dissertation
Full Text:: , Saad of thc &spa tsent of e*tseslagy &t Sre6on Stat* €ollag* for thsln halp and augg*etlon** ?o Br

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

Arthropod community organization and development in pear

Creator:: Gut, Larry J.
Abstract:: Arthropod communities in pear are conceptualized as hierarchically organized systems in which several levels of organization or subsystems can be recognized between the species population level and the community as a whole. An individual tree is taken to be the community habitat with arthropod subcommunities developing on leaf, fruit and...
Resource Type:: Dissertation
Full Text:: Arthropod Community Organization and Development in Pear

Management of variegated cutworm in peppermint

Creator:: Coop, Leonard Bryan
Abstract:: A pest management program for variegated cutworm (VC), Peridroma saucia (Hubner), in Oregon peppermint was developed based on studies of pheromone trapping, sampling methods, and economic thresholds. Pheromone traps effectively trapped VC males and were used to reflect development and oviposition trends. Trap height was linearly correlated to moth catch...
Resource Type:: Dissertation
Full Text:: . Major outbreaks of this pest were reported during 1900, 1905, 1914, and 1925 (Lovett 1915, Snyder 1951

ScholarsArchive@OSU

The biology and control of the insect vectors of potato viruses in Oregon

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

Biology of some Oregon rain bettles, Pleocoma spp., associated with fruit trees in Wasco and Hood River counties

Population dynamics of the Douglas-fir cone moth, Barbara colfaciana (Kft.) (Lepidoptera:Olethreutidae)

The root insect-- black-stain root disease association in Douglas-fir : vector relationships and implications for forest management

The western oak bark beetle, Pseudopityophthorus pubinpennis (Lec.), in the central Willamette Valley of Oregon

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)

Arthropod community organization and development in pear

Management of variegated cutworm in peppermint

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