Information about the noxious weed bull thistle. Common groundsel is also known by its scientific name, Cirsium vulgare. Bull thistle is a non-regulated Class C noxious weed. Because this weed is very ...

Information about the noxious weed cotton thistle. Cotton thistle is also known by its scientific name, Onopordum acanthium. Cotton thistle is a regulated Class B noxious weed. This means control is ...

Russian thistle first appeared in North America in the 1870s near Bon Homme County, South Dakota, after its seeds seemed to have arrived after mixing with flaxseed brought from the Russian Empire. The ...

Plumeless thistle stems are branched and covered with spiney leaves. Rosettes have deeply lobed, narrow, and spiny leaves.

Fall Weed Control: Musk thistle: It’s not too late to do something. The issue: Musk or nodding thistle is a non-native biennial thistle that is continuing to spread like wildfire throughout Idaho.

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 ...

This has been a phenomenal year for germination of noxious weeds. Scotch thistle, for instance. Scotch thistle grows up to 13 feet tall. Cutting the root 2 inches below ground will kill that root and ...

The first step to controlling Kochia and Russian Thistle is to keep current plants from producing seed that is added to the seed repository in soils. Limit disturbances such as tractor, animal and ...

SUE BIRD Special to the Yakima Herald-Republic Sep 13, 2026 Sep 13, 2026 0 In our 50th year of providing support for landowners in weed control, the Yakima County Noxious Weed Board has seen the ...