Aquatic herbicide applications for the control of Eurasian watermilfoil (EWM) are planned for between August 20 to 25th. See below for water use restrictions and treatment information.
The treatment for Priest Lake was been completed on August 25, 2020. Restrictions are no longer in effect. There will be no further updates.
There will be no restrictions for potable water use, swimming or fishing.
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are no longer in effect.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 2020 PRIEST LAKE, IDAHO
EURASIAN WATERMILFOIL TREATMENT
August 6, 2020
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 August 20 and 25th, 2020, based on water temperature, plant growth and weather conditions. The treatment timing was selected to maximize treatment efficacy when Eurasian watermilfoil is actively growing. Approximately 7 acres of the lake will be treated during one treatment event 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. Water use restrictions 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 (208-993-0950), 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: