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A revision of the genus Colladonus (Homoptera, Cicadellidae)

Creator:: Nielson, Mervin William
Resource Type:: Dissertation
Full Text:: which would have made this stuq impossible. To Dr. Paul O. Ritcher ot Oregon State College, who as

The species of Chaetocnema north of Mexico (Coleoptera : Chrysomelidae)

Creator:: Gentner, Louis G., 1892-1980
Resource Type:: Dissertation
Full Text:: the Museum of Comparative Zoology, Cambridge; and to Paul O. Hitcher for reviewing and criticizing

The life history and habits of a new species of seed midge, Dasyneura Sp., which attacks Ladino clover

Creator:: Bishop, Guy William
Resource Type:: Masters Thesis
Full Text:: writer wishes to express his appreciation to Dr. Paul O. Hitcher, Head of the Department of Entomology

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:: in twenty or more orch rds in the Rood River Valley. Dr . Paul o. Ritcher , Ch irmlln, Dep rtment

Phospholipids and their components in the nutrition and metabolism of the blowfly, Phormia regina (Meig.)

Creator:: Hodgson, Ernest
Resource Type:: Dissertation
Full Text:: . 1'o Dr • H. H. crowell and Dr • P~ 0 • R1tcb.er, l wish to express my gratitudft tor their help

Biology and control of the black cherry aphid, Myzus cerasi (FAB.), in the Willamette Valley

Creator:: Gilmore, James Eugene
Resource Type:: Masters Thesis
Full Text:: B. Gilmoro ACKNOLDGMNTS The writer is deepi indebted to his major professor, Dr. Paul O

Systematics of larval Aphodiinae with notes on the biologies of several species (Coleoptera: Scarabaeidae)

Creator:: Jerath, Manohar Lal
Resource Type:: Dissertation
Full Text:: this study inlpossible .. To Dr. Paul o. Ritcher, Professor and Head, Ento mology Department for

Biology and feeding habits of pleocoma larvae (Coleoptera : Scarabaeidae) in western Oregon coniferous forest

Creator:: Fellin, David G.
Abstract:: Food habits and biology of five species of Pleocoma larvae were studied at a dozen forested sites in western Oregon between May 1960 and December 1961. First instar Pleocoma hatch in late summer and moult to second instars in early fall. Second and subsequent instars moult annually between mid-summer and...
Resource Type:: Dissertation
Full Text:: supported by the Oregon Agricultural Experiment Station. I would like to thank Dr. P. O. Ritcher and Dr. J

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:: . Paul O. Ritcher who arranged my research assist- antship and was very helpful during the degree work

Larval systematics of the Troginae in North America, with notes on biologies and life histories (Coleoptera: Scarabaeidae)

Creator:: Baker, Charles William, 1937-
Abstract:: A study of the immature stages of the subfamily Troginae in North America was conducted from the spring of 1963 through the spring of 1965, Larvae of Trox and Omorgus were easily reared in the laboratory, but all attempts to rear the larvae of Glaresis were unsuccessful, The suberosus group,...
Resource Type:: Dissertation
Full Text:: study. A special debt of gratitude is owed to the following: Dr. Paul O. Ritcher who suggested the

ScholarsArchive@OSU

A revision of the genus Colladonus (Homoptera, Cicadellidae)

The species of Chaetocnema north of Mexico (Coleoptera : Chrysomelidae)

The life history and habits of a new species of seed midge, Dasyneura Sp., which attacks Ladino clover

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

Phospholipids and their components in the nutrition and metabolism of the blowfly, Phormia regina (Meig.)

Biology and control of the black cherry aphid, Myzus cerasi (FAB.), in the Willamette Valley

Systematics of larval Aphodiinae with notes on the biologies of several species (Coleoptera: Scarabaeidae)

Biology and feeding habits of pleocoma larvae (Coleoptera : Scarabaeidae) in western Oregon coniferous forest

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

Larval systematics of the Troginae in North America, with notes on biologies and life histories (Coleoptera: Scarabaeidae)

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