Aquatic Herbicide applications for the control of Curlyleaf Pondweed (CLP) are planned for the week of May 17, 2021. See below for water use restrictions and treatment information.
There will be restrictions for potable water use during and after the treatment until post tretament residue analysis confirms endothall levels below 0.1 ppm. This restriction does not apply to incidental exposure or consumption by humans or animals.
There will be 7 days of restrictions for annual nursery or greenhouse crops including hydroponics or newly seeded sod or turf.
Please refer to treatment maps and water use restrictions below for additional information about these treatments.
NOTICE OF 2021 LAKE COEUR D'ALENE
CURLY-LEAF PONDWEED TREATMENT
May 1, 2021
Dear property owners and lake users,
Curly-leaf pondweed has been identified as a significant invasive species within Lake Coeur d'Alene, Idaho and is known to negatively affect the beneficial uses of a waterbody. As such, an aquatic herbicide treatment is planned for portions of northern Lake Coeur d'Alene the week of May 17, 2021, based on lake level, water temperature, plant growth and weather permitting. The treatment timing was selected to maximize treatment efficacy when Curly-leaf pondweed is actively growing. Up to 9 acres of the lake will be treated during one treatment event with liquid endothall (Aquathol K, EPA Registration # 70506-176). Please see the following website for information on the endothall herbicide.
Water use restrictions willbe in effect due to the prsence of potable water or irrigation water intakes within or upto 600 feet away of the treatment areas. The following water use restrictions apply:
Recreational Use of Water in treatment Area: There are no swimming or fishing restrictions within the treatment areas.
HumanConsumption:Potable water restriction in effect during and after treatment until post treatment analysis confirms endothall levels are below 0.1 ppm. This does not apply to incidental exposure of animals to treated water.
Animal Consumption: Do not intentionally use water from the treated area for animal consumption. This does not apply to incidental exposure of animals to treated water.
Irrigation: No irrigation restrictions for turf, orbnamental and broadleaved plants, or food crops. Irrigation restrictions will be in effect for 7 days for annual nursery or greenhouse crops including hydroponics or newly seeded sod or turf.
For up to date information on water use restrictions please and treatment date 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 Aquathol K® that will be used, please go to the following link where the herbicide label and Safety Data Sheet are available for review: