Hoary Alyssum

Toxicity to horses has been reported when green or dried forage is contaminated
by more than 30 percent. It can proliferate in forage crops, pastures, and rangelands and rapidly fills
in areas disturbed or overgrazed. Maintaining healthy stands of vegetation and reseeding after major
disturbances are the best ways to prevent establishment. Herbicides are an effective control option, and
repeated applications may be necessary to treat plants that emerge throughout the growing season.