Prather, Timothy S.

Although woody knotweeds were introduced to the United States as an ornamental, they are now known to break asphalt, disrupt sewer lines, destabilize stream banks, and reduce insect diversity. This pu ...

Oxeye daisy is a showy perennial herb that was introduced from Europe. It is a noxious weed in Washington and several Idaho counties. Once established, oxeye daisy competes against grasses, reduces ca ...

Reviews Russian thistle biology as it relates to management, including seed dormancy and longevity in soil, seed distribution, seed germination and emergence, plant growth after establishment, crop competition, and resistance to herbicides. Outlines key considerations for managing for 3 crop years and 1 fallow year. Describes results from a residue management experiment designed to determine how to reduce tillage while maintaining winter wheat production.

Pigweed is an invasive plant pest usually found in disturbed areas, like farmland and along roadsides and fencelines. Because their aggressiveness can reduce crop yields, this PNW discusses how to prevent or curtail their spread in the region by learning how to identify them, their impacts, and the most effective control options (sanitation, mechanical, cultural, and herbicidal methods).