Exterminating milfoil The Idaho State Department of Agriculture (ISDA) has confirmed the presence of Eurasian watermilfoil, an aquatic noxious weed, in Blue Heart Spring near Box Canyon on the Snake River. ISDA’s recent investigation and sampling confirmed the presence of both Andean watermilfoil, a native species, and Eurasian watermilfoil (EWM).
“This investigation was initiated after Visit Southern Idaho expressed concern about unusual plant growth in Blue Heart Spring,” said Jeremey Varley, ISDA Noxious Weeds Section Manager. “These kinds of reports are vital and underscore the importance of the ‘See Something, Say Something’ philosophy in invasive species management.”
EWM can reduce waterflow, decrease oxygen levels in water, and impede recreation. This is not the first time the plant has been confirmed in Magic Valley.