The seedhead and root-boring weevil feed only on invasive spotted knapweed, and die when the weed is no longer available, according to USDA.

Add Yahoo as a preferred source to see more of our stories on Google. The two weevils, seedhead and root boring, feed exclusively on spotted knapweed. The public is invited to give their input on the ...

Get any of our free daily email newsletters — news headlines, opinion, e-edition, obituaries and more. By the time John Thiede got back to Bozeman with his pint-size carton of knapweed root weevils, ...

LAKETOWN TOWNSHIP, Mich. — Volunteers are working to clear a state park of its invasive species. More invasive species: New study reveals golden oyster mushrooms threatening Michigan's forests Led by ...

Spotted knapweed (Centaurea stoebe) is a biennial or short-lived perennial native to Eastern Europe. It was introduced into the U.S. in the 1800’s as a contaminate in seed. It is an extremely invasive ...

MISSOULA (AP) - A U.S. Forest Service researcher is exploring a possible relationship between spotted knapweed, the insects imported to kill the noxious weeds and deer mice that carry hantavirus.

In his greenhouse, Ragan Callaway pits spotted knapweed plantings (left) against native Montana grasses (right), trying to outwit the weed's chemical weaponry. Brian Smale Wayne Slaght is a rancher.

Volunteers are set to help remove invasive plants at Saugatuck Dunes State Park from 10 a.m. to 12 p.m. Aug. 24, according to a community announcement. The event follows a successful volunteer day Aug ...

One of the first questions usually asked when people are introduced to using bio-agents (insects to help control noxious weeds) is: "How safe are these insects?" This is a legitimate concern and needs ...