Several bean yellow mosaic virus (BYMV) strains, presumably
not transmissible by aphids, were studied to determine the biological
and environmental conditions which would possibly result in aphid
transmission of these strains. Investigations were made to study the
effect of different aphid rearing conditions on the transmission
frequency of BYMV. Also,...
The male genitalia of 69 species, representing eight genera of
sphecid wasps, were examined in order to ascertain their taxonomic
value. In all, the male genitalia of approximately 1000 specimens
were critically studied.
Emphasis was placed on the genitalia and associated sclerites
of the known males in the genus Eucerceris....
Fifty species and subspecies and six varieties in eight genera of
the family Tabanidae are recognized from Oregon. The following genera
are represented in Oregon: Apatolestes Williston, Pilimas Brennan,
Stonemyia Brennan, Silvius Meigen, Chrysops Meigen, Atylotus Osten
Sacken, Hybomitra Enderlein and Tabanus Linnaeus. Adults and larvae
were collected from various...
The insect fauna of a small second order intermittent stream
near Corvallis, Benton County, Oregon was studied. The species
composition was determined, attempts were made to monitor migration
to the stream, qualitative and quantitative benthos samples were
taken, emergence was sampled, the dry stream bed was examined
for forms of...
From May through November 1963, a mosquito survey was
made in the city of Corvallis, Oregon. The information
obtained dealt with the species of mosquitoes found,
their seasonal occurrence and the location and nature of
their larval habitats. A quantitative and qualitative
analysis of larval and adult mosquito collections by...
Plecoptera were collected from four sampling stations selected
to represent a range of conditions on Oak Creek, a small woodland
stream originating in the foothills of the Oregon Coast Range. The
elevation of Site I was 700 ft. while the lowest site was located at 225
ft. Monthly benthos samples...