Exotic Pest Reporting
Michael Rasy, University of Alaska, Bugwood.org
Perennial sowthistle (Sonchus arvensis) is an invasive plant. It is a native of Eurasia and was first detected in Great lakes region in 1865.
Sowthistle is considered a noxious weed in California, Idaho, Illinois, Iowa, Maryland, Minnesota, Nevada, North Dakota, South Dakota, and Wyoming as they grow quickly in a wide range of conditions and their wind-borne seeds allow them to spread rapidly. Sonchus arvensis, is considered economically detrimental, as it can crowd commercial crops, is a heavy consumer of nitrogen in soils, may deplete soil water of land left to fallow, and can regrow and sprout additional plants from its creeping roots.
Summaries of State Plant Protection Laws and Regulations
07/26/2017 - Help rid Fort Collins of noxious weeds
04/03/2015 - Weed of the Month: Thistle