The fish Cymatogaster aggregata, Embiotoca lateralis and
Phanerodon furcatus served as definitive hosts for the trematode
Telolecithus pugetensis Lloyd and Guberlet. Eggs that were collected
from the terminal part of the uterus of mature worms were found to
have undergone several cleavages, but complete development was
observed only in some...
Plantation failures on abandoned pasture lands and old clearcuts are associated frequently with heavy stands of herbaceous vegetation. The competitive influence of the vegetation has been described as the causative factor of mortality, but quantitative estimates of vegetation influence are lacking. The development of chemicals with promise for selectivity in...
A taxonomic investigation was made of 24 taxa belonging
to the section Trichodium (Michx.) Trin., of
Agrostis, and the genus Podagrostis. Experimental methods
were employed, including: uniform garden culture of transplants
and plants grown from seeds collected in natural
populations; breeding studies; physiological and phenological
investigations; cytological studies; ecological
studies...
Studies were conducted on artificially infected susceptible and
resistant barley varieties in an attempt to determine the effect of
barley yellow dwarf virus on the growth and development of these
plants. A resistant and a susceptible variety were infected at four
stages of growth and harvested at two stages. Roots,...
Purpose of the Study:
The purpose of this research was to study the school districts
in Umatilla County as they existed in 1962-3 and to formulate a
guide for reorganization of these districts into sound efficient units.
The following sub-factors were considered essential to this research,
and were dealt with...
The herbicides Diquat (1, 1'-ethylene-2, 2'-dipyridylium
dibromide), Paraquat (1, 1'-dimethyl-4, 4'-dipyridylium dichloride),
and Gramoxone (1, 1'-dimethyl-4, 4'-dipyridylium dimethyl sulphate), and the spreader X-77, a mixture of alkylaryl-polyethylene
glycol, free fatty acids and isopropanol, were tested by
several soil microbial methods in an attempt to find out if concentrations of these...
Endogenous inhibitors of insect microsomal oxidases are a serious
problem in in-vitro studies of insecticide metabolism.
Their number,
chemical nature, modes of action, and their effectiveness as inhibitors
are unknown.
In the case of house flies, there may be as many as
four inhibitors.
The most important of these is...
The research study discussed and amplified in this paper consisted
of the development and evaluation of two instructional concepts
illustrating the procedures for 1) typing an offset master, and 2) duplicating
offset copies. Each concept was prepared for use with the
Audiscan projector, which utilizes a 16mm continuous loop filmstrip...
The purpose of the study was to survey aspects of environmental
knowledge and beliefs among Grade 10 students in Australia, in the
belief that such information would be useful for workers in the developing
field of environmental education there.
A survey instrument prepared and used for a similar purpose in...
