Aquatic herbicide applications for the control of Eurasian Watermilfoil (EWM) were planned for the week of September 26, 2022. See below for water use restrictions and treatment information.
The aquatic herbicide treatment ocurred,
Tuesday, September 27, 2022
All water use restrictions have been lifted. There will be no further updates.
For updates on water use restrictions, see the Idaho State Department of Agriculture (ISDA) Water Right Notice below and visit ISDA website at:
There are no restrictions for potable water use, swimming, fishing or turf irrigation.
There will be no restrictions for irrigation of turf.
Food crop and non-food crop irrigation water use restrictions are no longer in effect.
NOTICE OF 2022 PRIEST LAKE, IDAHO
EURASIAN WATERMILFOIL TREATMENT
Dear property owners and lake users,
Eurasian watermilfoil has been identified as a significant invasive species within Priest Lake, Idaho and is known to negatively affect the beneficial use of a waterbody. As such, an aquatic herbicide treatment is planned for discrete areas of Priest Lake between the week of September 26, 2022, based on weather conditions. The treatment timing was selected to maximize treatment efficacy when Eurasian watermilfoil is actively growing. Approximately 4 acres of the lake will be treated with liquid florpyrauxifen-benzyl (ProcellaCOR EC, USEPA Registration # 67690-80). Please see the following website for information on the florpyrauxifen-benzyl herbicide:
Water use restrictions will be in effect for irrigation water intakes within the treated areas of the lake. Notifications will be established to 0.25 miles away of the treatment areas. The following water use restrictions apply:
Irrigation Use of Water: Do not irrigate established food crops until water use restrictions are lifted. Do not irrigate other non-food crops, such as landscape ornamentals, until water use restrictions are lifted. There is no restriction for irrigation of turf.
Recreational Use of Water in Treatment Areas: There are no swimming or fishing restrictions within the treatment areas.
Potable Water in Treatment Area: There are no restrictions on consumption of treated water for potable use or by pets or other animals.
For up to date information on water use restrictions, treatment date and treatment location, please visit the applicator's website:
Please contact Tom Moorhouse, Aquatic Pest Control Adviser with Clean Lakes, Inc., (208-929-2757) or Jeremey Varley, Section Manager - Noxious Weeds, Idaho State Department of Agriculture (208-332-8667), with any questions.
For information related to the aquatic herbicide ProcellaCOR® that will be used, please go to the following link where the herbicide label and Safety Data Sheet are available for review:
Additional location information is available at the Idaho State Department of Agriculture website that provides an interactive map at the following link.
