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A review of the genus Torymus for Oregon and California (hymenoptera: chalcidoidea: torymidae)

Creator:: Hobbs, Kenneth Rollin
Resource Type:: Dissertation
Full Text:: . . , , , , , , i5S ACKNJLEDQEMENTS My appreciation is extended to Dr. W. P. Stephen for his advice during the

A survey of alfalfa pollinators and polination in the San Joaquin Valley of California with emphasis on establishment of the alkali bee

Creator:: Torchio, Philip F.
Abstract:: The study involves the establishment, management, and behavioral observations of Nomia melanderi Cockerell and Megachile rotundata (Fabricius) in California, a survey of native bees within western Fresno County, a determination of selfing and/or parthenocarpy in two fields of alfalfa, and observations on the honeybee as an alfalfa pollinator. The alkali...
Resource Type:: Masters Thesis
Full Text:: assistance during the course of this study: To my major professor, William P. Stephen, Professor of

Mechanisms of orientation in the leaf-cutter bee Megachile rotundata (Fabricius)

Creator:: Osgood, Charles Edgar
Abstract:: The leaf- cutter bee Megachile rotundata (Fabricius) is an important alfalfa pollinator in western North America. This study was designed to provide information on methods of orientation used by M. rotundata in order to make recommendations regarding the parameters within which adult nesting populations may be relocated. Preliminary studies suggest...
Resource Type:: Dissertation
Full Text:: . William P. Stephen, Professor of Entomology, Oregon State University, for his patience and advice

Toward a continuous culture of bumble bees (Bombus Latr.)

Creator:: Seibert, Thomas Floyd
Abstract:: Out of 53 queens captured for initiating colonies in the laboratory, 33 laid eggs (62 percent), 29 of these produced colonies (55 percent), and 14 produced queens (26 percent). A behavioral model depicts the activities of queens from spring emergence through colony development. A discussion of its application to bumble...
Resource Type:: Masters Thesis
Full Text:: I would like to thank my major professor, Dr. William P. Stephen, for the wide latitude he allowed

Arboreal arthropod predation on early instar Douglas-fir tussock moth

Creator:: Fichter, Becky L.
Abstract:: Loss of early instar Douglas-fir tussock moth (Orgyia pseudotsugata McDunnough) (DFTM) has been found to constitute 66-92% of intra-generation mortality and to be a key factor in inter-generation population change. This death has been attributed to dispersal and to arthropod predation, two factors previously judged more important to an endemic...
Resource Type:: Dissertation
Full Text:: Tussock Moth Abstract approved: Redacted for privacy William P. StOphen Loss of early instar Douglas

Interactions and persistence of the mosquitocidal bacteria Bacillus sphaericus and Bacillus thuringiensis var. israelensis

Creator:: Donegan, Katherine K.
Abstract:: Interactions between Bacillus sphaericus and Bacillus thuringiensis israelensis (Bti), persistence of insecticidal activity in the mosquito habitat, and suitability of enzyme-linked immunoabsorbent assay (ELISA) for detecting and quantifying bacterial endotoxin in the mosquito habitat were investigated. Interactions between the two bacterial species were examined by laboratory and field bioassays with...
Resource Type:: Masters Thesis
Full Text:: . israelensis Abstract approved: Redacted for Privacy Willi P. Stephen Interactions between Bacillus

Isozymic and cytological studies on populations of the introduced bee species, Megachile (Eutricharaea) rotundata and M. (Eutricharaea) apicalis

Creator:: Chen, Xiaoshe
Abstract:: Thirteen New World populations of Megachile rotundata and M. apicalis and two Old World populations of M. rotundata were analyzed at 23 enzyme loci using cellulose acetate electrophoresis. Conventional and G- or C-banded karyotypes were also examined in these populations. The principal findings are (1) No differences were found in...
Resource Type:: Dissertation
Full Text:: . (Eutricharaea) apicalis Abstract approved: William P. phen Thirteen New World populations of Megachile

A model study of the alfalfa leafcutter bee - seed production system

Creator:: Stark, Steven Bruce
Abstract:: The behaviors of the alfalfa leaf cutter bee - seed production system under imposition of several management regimes were studied through the use of a simulation model that contains mechanisms for the following processes: 1) immature bee development and diapause; 2) immature bee mortality; 3) female bee emergence; 4) nesting...
Resource Type:: Dissertation
Full Text:: Production System. Abstract approved: Redacted for privacy W. Scott Overton Redacted for privacy William

Quantifying the Unproductive Water Lost as Evaporation from Different Irrigation Designs by Analysis of the Soil Stable Water Isotope Compositions

Creator:: Al-Oqaili, Firas M.
Abstract:: The knowledge about the intensive agricultural irrigation is very limited, but the use of irrigation is rapidly increasing. As an outcome, the sympathetic ecosystem is accepting modern irrigation that will play an essential function in the present and future for agricultural products. My dissertation will display the modification for investigation...
Resource Type:: Dissertation
Full Text:: : ______________________________________________________ Stephen P Good Abstract The knowledge about the intensive agricultural irrigation is

Biological studies of the vetch bruchid, Bruchus brachialis Fahraeus in Oregon

Creator:: Steinhauer, Allen Laurence
Resource Type:: Masters Thesis
Full Text:: writer wishes to exres hi3 Eratitude to Dr. Wi11i.m P. ;tephen, Asistant Prcfe3sor, Oreon tate Co11eo

ScholarsArchive@OSU

A review of the genus Torymus for Oregon and California (hymenoptera: chalcidoidea: torymidae)

A survey of alfalfa pollinators and polination in the San Joaquin Valley of California with emphasis on establishment of the alkali bee

Mechanisms of orientation in the leaf-cutter bee Megachile rotundata (Fabricius)

Toward a continuous culture of bumble bees (Bombus Latr.)

Arboreal arthropod predation on early instar Douglas-fir tussock moth

Interactions and persistence of the mosquitocidal bacteria Bacillus sphaericus and Bacillus thuringiensis var. israelensis

Isozymic and cytological studies on populations of the introduced bee species, Megachile (Eutricharaea) rotundata and M. (Eutricharaea) apicalis

A model study of the alfalfa leafcutter bee - seed production system

Quantifying the Unproductive Water Lost as Evaporation from Different Irrigation Designs by Analysis of the Soil Stable Water Isotope Compositions

Biological studies of the vetch bruchid, Bruchus brachialis Fahraeus in Oregon

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