This course provides information on the current status of insect-based biological control of diffuse and spotted knapweed, rush skeletonweed, and poison hemlock in Washington state.

Approved in the following states:

• 1 Credit: Alaska, Montana (0, 1, 2, 6, 10, 14, 15, 23, 40), Oregon, Washington (Max, Weed)
   
• 2 Credits: Maryland (3A, 6, 10), Pennsylvania (10, 18, 23), West Virginia (4A, 7)