Water quality changes along hyporheic flow paths may have important effects on river water quality and aquatic habitat. Previous studies on the Williamette River, Oregon, showed that river water follows hyporheic flow paths through highly porous deposits created by river channel meandering. To determine water quality changes associated with hyporheic...
Irrigation percolation can be an important source of shallow aquifer replenishment in arid regions of the southwestern United States. Aquifer recharge derived from irrigation percolation can be more significant in fluvial valleys overlying shallow aquifers where highly permeable soils allow rapid water infiltration and aquifer replenishment. We used data from...
Southwestern US irrigated landscapes are facing
upheaval due to water scarcity and land use conversion associated
with climate change, population growth, and changing
economics. In the traditionally irrigated valleys of northern
New Mexico, these stresses, as well as instances of community
longevity in the face of these stresses, are apparent....
Benomyl, a systemic benzimidazole fungicide was
incorporated into artificial diet and evaluated for its
oral toxicity to nonparasitized and parasitized third
instar orange tortrix larvae, Argyrotaeniae citrana
(Fernald) and its food chain toxicity via the host to the
solitary braconid endoparasite Apanteles aristoteliae
Vierek.
Concentrations of benomyl ≤ 300 ppm...
A pharmacognostic study was made of the root of Heracleum
mantegazzianum, an umbelliferous species which is of value as a
source of natural coumarins.
Three groups of seeds were tested to determine the presence
of a germination requirement for moist cold and the possible value
of gibberellic acid in obviating...
The purpose of this study was to determine the present status
of introduced parasites of the omnivorous leaf tier, Cnephasia
longana (Haworth) in Oregon.
The omnivorous leaf tier is native to Europe. It was introduced
into North America around 1929 and became a serious pest of economic
crops such as...
The goal of the project was to develop a functional prototype of an environmental risk assessment parameter database on the World-Wide Web. The ability to develop a consolidated environmental database has become possible due to the phenomenal growth of the Internet and the World-Wide Web over the past few years....