The key principle to Canada thistle control is to stress the plant and force it to use stored root nutrients. Canada thistle can recover from almost any stress, including control attempts, because of ...

Q: We recently moved to a new home and have inherited flower beds which are inundated with thistle. We have weeded these beds several times, but more thistle just pops up. How can we control this ...

In greenhouse studies, atrazine (2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine killed Canada thistle [Cirsium arvense (L.) Scop.] when applied as preemergence or postemergence treatments.

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 ...

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, ...

Canada thistle is very challenging to control and success usually occurs through utilizing a variety of methods. The first step is to limit establishment by minimizing the risk of the introduction of ...

Contrary to its name, Canada thistle was actually introduced from Eurasia. Its highly aggressive manner crowds out native species and is difficult to control. This plant is targeted by Eagle County’s ...

Canada thistle may look beautiful and innocent with its bright yellow and purple flowers towering above North Dakota's crops and prairie grasses, but looks may be deceiving. The plant is an invasive ...

Canada thistle (Cirsium arvense) is an aggressive, creeping perennial weed that infests crops, pastures, rangeland, roadsides and noncrop areas. Generally, infestations start on disturbed ground, ...