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 (10, 30, 33, 34, 37, 39, 44, 45, 55, 60); Oregon; Utah; Washington

2 Credits: Pennsylvania (10, 18, 23); West Virginia (4A, 7); Maryland (3A, 6, 10)