Controlling Whitetop on the Sweetwater

Whitetop, or hoary cress, is an aggressive perennial forb that is tolerant of salty soils, like those found along the Sweetwater River. This invasive plant is on the Wyoming State-listed Noxious Weed list. Plants aggressively establish where extra water is available, like swales, irrigated fields without frequent cultivation, and in riparian areas. Infestations rapidly establish dense stands and decrease rangeland health by ultimately crowding out beneficial plant species. Cattle and sheep will graze whitetop but don’t offer much control.

Pathfinder Ranches has undertaken an intensive management process for whitetop treatment utilizing herbicide, which is the most feasible method of control. Future treatments may include frequent mowing and herbicide usage to suppress and eliminate the presence of the species along the Sweetwater River.


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P.O. Box 768

Cheyenne, Wyoming 82003