Knapweeds are noxious weeds in Colorado which belong to the Carduoideae clade, also known as thistles and allies. This grouping of the aster family classifies knapweeds, burdock, artichokes, ...

December’s Weed of the Month is not one, but three species of knapweed: brown knapweed (Centaurea jacea), meadow knapweed (C. x moncktonii), and diffuse knapweed (C. diffusa). All three species are ...

When it comes to killing weeds, Boulder’s methods might seem a bit unconventional. Rather than using chemicals to take out diffuse knapweed and three types of thisles along the dams at Boulder ...

Diffuse knapweed (Centaurea diffusa) is an annual, biennial, or short-lived perennial forb native to southeast Europe and western Asia. It was introduced into the U.S. as a contaminate in seed. It is ...

Scientists have speculated for decades that spotted knapweed is able to spread over large areas because of a secret weapon -- an ability to release a chemical that kills surrounding plants. Until now, ...

We are running low on questions – please write to Pat. You can e-mail her at home@spokesman.com Or write her at Home, The Spokesman-Review, 999 W. Riverside Ave., Spokane, WA 99201. We have 15 acres ...

Its name isn't pretty and neither are its effects on native plants — and wildlife officials would like you to pull them when you see patches of diffuse knapweed. Diffuse knapweed was first introduced ...

As startling claims about knapweed’s virulence are retracted, CU researchers show that weed-eating bugs can help control invasive species without herbicides It’s not often that plants, even foreign ...

Diffuse knapweed (Centaurea diffusa) is a native of the eastern Mediterranean and western Asia region. It is a bushy annual, biennial or short-lived perennial, but mostly biennial, with a mature size ...

As startling claims about knapweed’s virulence are retracted, CU researchers show that weed-eating bugs can help control invasive species without herbicides It’s not often that plants, even foreign ...