Field and greenhouse experiments were conducted in 1996 and 1997 to evaluate
the effects of integrating conservation tillage and cover cropping on broccoli production
as well as agroecological parameters.
A field experiment was conducted during 1996-97 at the Oregon State University
Horticulture Research farm near Corvallis, OR. The specific objectives...
Legume cover crops can serve as important sources of nitrogen (N) in sustainable agriculture and can be economically beneficial when fertilizer inputs are reduced without a yield reduction. Synchronizing N mineralization from organic materials with the needs of the subsequent crop is a challenge for organic growers.
Predicting plant available...
Five field experiments were conducted to evaluate the relative attractiveness of potential beneficial insectary plants to aphidophagous hover flies and parasitic Hymenoptera and the effectiveness of interplanting selected flowering plants in a broccoli field to enhance biocontrol of the cabbage aphid and green peach aphid. In 1996 we established a...
The western spotted cucumber beetle (Diabrotica undecimpunctata
undecimpunctata) and the western striped cucumber beetle (Acalymma trivittatum) are
pests of many crops, including vegetable, fruit, and nursery crops. Pesticides are
commonly used to control this pest. Trap and kill technologies are under development as
use in an alternative control for cucumber...
Energy input comparisons between tillage systems; evaluation of the value of legumes as part of a cover crop mixture used in strip-till sweet corn production; evaluation of the nitrogen contribution of legume-based cover crops to organic vegetable production.
1. Develop and evaluate a Pilot IPM scouting program for the WSCB in snap beans
2. Determine the seasonal aggregation and movement patterns within diversified vegetable cropping systems
3. Evaluate the potential for “trap and kill” strategies as cultural control components of an IPM program for the WSCB...
1. Implement and evaluate a Pilot IPM scouting program for the WSCB in snap beans
2. Evaluate WSCB seasonal aggregation and movement patterns within diversifi ed vegetable cropping
3. Evaluate the potential for “trap and kill” strategies as cultural control components of an IPM program
In the canyon grasslands of Garden Creek Ranch Preserve in Idaho, where the
threatened plant Silene spaldingii occurs and invasion by the exotic species Centaurea
solstitialis and Bromus tectorum is proceeding rapidly, I examined environmental and
community patterns of site invasion, and evaluated the apparent influence of invasion on
Four key aspects of the relationship between predatory hoverflies and the aphid
pest Brevicoryne brassicae L. on broccoli were investigated in the Willamette Valley,
Oregon USA: 1) the relationship between aphid density and hoverfly oviposition, 2) the
larval voracity of key hoverfly species, 3) the preferences of hoverflies and broccoli...