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. Published date 2009
1 Credit: Alaska, Idaho, Montana (10,30,33,34,37,39,44,45,55,60), Nevada (C1,C6,B1,B2 general), New Mexico (00, PRAP, PRRO), Oklahoma(1A, 3A, 6, 10), Oregon, South Carolina, Tennessee (C03,C06,C10,C12,LHA), Utah, Washington, and Wyoming.
2 Credits: Pennsylvania (10, 18, 23), and West Virginia (4A,7), Maryland (3A,6,10).