Due to the wet springs we’ve had, common mullein and Canada thistle have been especially prolific the last several years. With seed-heads and flowers on the plants now, both weeds are at their most ...

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, ...

Farmers who don't rely on or want to minimize the use of chemical herbicides need creative solutions to win the battle against aggressive perennial weeds. In ongoing research at the University of ...

In mid September I was walking on the CU campus when I noticed a teeming population of weevils on a small cluster of Canada thistles. Almost half of them were amplectic. Several hours later, when I ...

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 ...

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 ...

Grassland restoration is a common practice to restore wildlife habitat and ecological function to farmed landscapes. In South Dakota, grassland restoration can come in many forms, from common “program ...