New noxious weed found in Wyoming

In summer 2023, a new noxious weed was identified in two locations in the Big Horn Basin: one was found in a Washakie County sugar beet field, and another under a bird feeder at the Park County Animal Shelter.

Palmer amaranth (Amaranthus palmeri) is an invasive annual weed native to the Southwestern United States and Northern Mexico. It was first identified as a problem noxious weed in the Southeastern United States, where it caused major problems in the region's cotton industry and has since spread to nearly every U.S. State and Canada.

Palmer amaranth thrives in regions used for row crop pro...