Perennial ryegrass (Lolium perenne) hay is an important source of forage for a variety of livestock species, and is most common in cool, coastal climates such as the Pacific Northwest. An endophyte fungus called Neotyphodium lolii frequently colonizes this grass to promote insect resistance, drought tolerance, and growth enhancement without...
Brachypodium sylvaticum (Huds.) Beauv. is an invasive grass that can be found in forest
and prairie communities throughout the Willamette Valley, Oregon. It can out-compete
native species of grasses and forbs and become dominant in a broad range of habitats.
This study investigated if there were differences in vegetation structure...
BACKGROUND. Residues of pesticides on crops can result in mortality to foraging bees. The likelihood of mortality can be mitigated by applying pesticides in the evening so that their residues dissipate by the following morning when bees resume foraging. The dissipation rates of different pesticides, or their residual toxicity, is...
A period of over forty years (1913-1954) of gold dredging dramatically changed
the landscape of Sumpter Valley, Oregon into a rocky, uninhabitable terrain. The Defrees
Ranch LLC used cattle feeding to increase top soil, vegetation, and habitat on the dredge
tailings. This thesis investigated the use of feeding cattle as...