To determine if the distribution and frequency of dicarboximide resistance in the Botrytis population in vineyards in western Oregon is rapidly changing or remaining relatively stable. 2. To determine the relationship between fungicide use and the frequency of dicarboximide-resistant strains of Botrytis cinerea in grape, raspberry, snap bean, and strawberry...
Gray mold of grape, caused by Botrytis cinerea, can be a serious problem in Oregon vineyards. Disease control has been achieved primarily through the application of foliar fungicides. For a time, the fungicide benomyl provided outstanding control of this disease; however, by the late-1970's, strains of B. cinerea resistant to...
Spore dispersal gradients and pod disease gradients from point
inoculum sources of Botrytis cinerea were measured over time in two
snap bean field experiments. Laboratory grown inoculum was placed
at ground level in a 30 x 30 cm square at bloom initiation and
removed at full bloom. Dispersal of inoculum,...
In the upper estuary of Yaquina Bay, Oregon, there is an annual
population explosion of Acartia tonsa, (Dana) a calanoid copepod,
during the months of July, August and September, followed by a rapid
decline to virtual extinction in November. The restricted estuarine
distribution affords an excellent opportunity to study the...
One of the most vexing problems facing the United States Forest
Service in Western Oregon concerns its management of undeveloped
forested lands. Many of these areas contain highly productive timberland,
and restriction of timber harvesting to preserve the land's
primitive character can be very costly. Also there are conflicting
pressures...
Investing in farmland is one of the most important decisions that
farmers face in their lifetimes. Usually, large amounts of debt are
required to purchase a substantial tract of land, thereby reducing the
farmer's liquidity position and future borrowing capacity. Fixed debt
commitments must be met by highly variable future...