PURPOSE: Yellow starthistle is one of most problematic invasive species in grass and rangelands in the western United States. It has expanded its distribution since the 1950’s threatening native species’ diversity and reducing the utility of rangelands for livestock. Control of yellow starthistle has relied heavily on the use of picloram and clopyralid. Although these herbicides have been widel...

Rapid changes in practices used to produce perennial grass seed crops in the U.S. Pacific Northwest region and shortened lengths of time that perennial grass seed fields remain in production have increased the need for additional rotation crops that are adapted to the poorly drained soils found in western Oregon. This research was conducted at three sites to determine ways to manage meadowfoam ...

(1) Background: The Clearfield™ system (CL) is currently the primary tool for selective weedy-rice management in irrigated rice. However, herbicide persistence soil may cause damage to successive crops. Thus, it necessary understand agricultural practices that can favor dissipation of these herbicides. objective this study was analyze factors affect imidazolinones and use information provide st...

introduction soil herbicides residue in agroecosystems is one of the important problems due to herbicides application. however herbicides residue in soil extend the period of weed control. nevertheless, it may persist longer than desired and injure subsequent crops in rotation. herbicides vary in their potential to persist in the soil. some herbicides such as sulfonylurea herbicides are very pe...

grass (Mueller-Warrant and Brewster, 1986), common occurrences in grass seed fields. Seed laws and market Effective weed control was a major concern of Oregon grass seed expectations define allowable limits for weed seed congrowers during their recent transition from open-field burning to mechanical methods of managing post-harvest residues. This 4-yr herbitamination, but production efficiency ...