There’s some interesting activity afoot in the cropfields and pastures of Colorado, Utah and Montana, as researchers explore a new biocontrol method for Canada thistle, by delicately sprinkling, ...

Cirsium arvense, commonly known as Canada thistle, Californian thistle, cursed thistle, creeping thistle, field thistle, corn thistle, perennial thistle or field thistle. Canada thistle is a native of ...

Controlling Canada thistle (Cirsium arvense) is one of the most pressing concerns of organic field crop growers. Not only can it limit yield but it can determine what it is possible to grow in a field ...

Canada thistle (Cirsium arvense) may sound friendly and indeed it has a lovely purple flower, but gardeners and landowners know better. This prickly perennial weed is a menace and is listed as a ...

close-up of canada thistle in dirt - butterfly's dream/Shutterstock If you've ever gone on a hike and seen a familiar green, spiky-looking plant, you've probably spotted Canada thistle (Cirsium ...

Because of our recent rain, the wildflowers on roadsides, fields and meadows have bloomed, and I have enjoyed their colors while identifying them. However, there is one I constantly fight and will ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Your vision of a perfect backyard might feature vibrant flower beds, a healthy lawn, and prolific ...

Canada thistle (Cirsium arvense) is a creeping perennial broadleaf that is native to the Mediterranean area. It spreads rapidly through underground stems called rhizomes and by producing seeds. It ...

Cambridge University Press (www.cambridge.org) is the publishing division of the University of Cambridge, one of the world’s leading research institutions and winner of 81 Nobel Prizes. Cambridge ...

Aminopyralid is a new auxinic herbicide that provides Canada thistle control at lower use rates than clopyralid. Studies were conducted to determine if differences in absorption, translocation, or ...