PNW0610

December 31, 2008

Being able to correctly identify the five knotweeds that grow in the Northwest can help you choose the best control strategies. Color photographs of the weeds accompany a detailed chart describing the stems, leaves and flowers of Japanese, giant, Bohemian and Himalayan knotweeds and low Japanese fleeceflower. Management strategies discussed include cultural, mechanical and biological control methods as well as the use of herbicides.

Authors: Timothy Prather, Timothy Miller, Sandra Robins

8 pages