Pesticides Currently Allowed for Use Under Permit in Washington Waters

Please be aware that the pesticide product labels provided on this page are for informational purposes only.

Current labels for the product listed on this page may be reached through the Pesticide Information Center Online (PICOL) databases.

Aquatic Plant and Algae Control General Permit

Pesticide	Commonly Used to Control
2,4-D Amine	Eurasian Watermilfoil (Myriophyllum spicatum) Duck Potato/Wapato/Arrowhead (Sagittaria spp.) Variable-Leaf Milfoil (Myriophyllum heterophyllum) Parrot Feather/Parrotfeather Milfoil (Myriophyllum aquaticum) Yellow Floating-Heart/Water Fringe (Nymphoides peltata) Water Primrose/Water Purslane (Ludwigia spp.)
2,4-D Ester	Eurasian Watermilfoil (Myriophyllum spicatum)
Bispyribac-sodium	n/a
Carfentrazone-ethyl	n/a
Diquat dibromide	Brazilian Elodea (Egeria densa Planch) Elodea (Egeria spp.) Common Waterweed/Elodea (Elodea canadensis Rich) Pondweeds (Potamogeton spp.) Curly-Leafed Pondweed (Potamogeton crispus) Water Nymph/Naiad (Najas spp.) Mexican Water-fern (Azolla mexicana C.) Duckweed (Lemna spp., Spirodela polyrrhiza) Bladderwort (Utricularia spp.) Coontail/Hornwort (Ceratophyllum demersum L.) Eurasian Watermilfoil (Myriophyllum spicatum) Yellow Floating-Heart/Water Fringe (Nymphoides peltata) Fragrant/White Waterlily (Nymphaea odorata)
Endothall (dipotassium salt)	Brazilian Elodea (Egeria densa Planch) Pondweeds (Potamogeton spp.) Water Nymph/Naiad (Najas spp.) Eurasian Watermilfoil (Myriophyllum spicatum) Algae
Endothall (mono salt)	Algae Cyanobacteria/Blue-Green Algae Filamentous Algae
Flumioxazin	n/a
Fluridone	Pondweeds (Potamogeton spp.) Brazilian Elodea (Egeria densa Planch) Elodea (Egeria spp.) Eurasian Watermilfoil (Myriophyllum spicatum) Hydrilla (Hydrilla verticillata) Water Nymph/Naiad (Najas spp.) Duckweed (Lemna spp., Spirodela polyrrhiza) Bladderwort (Utricularia spp.) Fanwort (Cabomba caroliniana) Freshwater Eelgrass/Tape Grass (Vallisneria spp.) Lilypads (Nymphaea spp., Nuphar spp.)
Glyphosate	Rushes (Juncus spp.) Bulrush (Scirpus spp.) Water-shield (Brasenia schreberi, Brasenia spp.) Yellow Flag Iris (Iris pseudacorus) Duckweed (Lemna spp., Spirodela polyrhiza) Purple Loosestrife (Lythrum salicaria L.) Yellow Pond-Lily/Spatterdock (Nuphar spp.) Fragrant/White Waterlily (Nymphaea odorata) Duck Potato/Wapato/Arrowhead (Sagittaria spp.) Reed Canary Grass (Phalaris arundinacea L.) Cattail (Typha spp.)
Imazamox	Curly-leafed Pondweed (Potamogeton crispus) selectively
Imazapyr	Yellow Flag Iris (Iris pseudacorus) Common Reed (Phragmites spp.) Salt Cedar/Tamarisk (Tamarix ramosissima) Tree of Heaven (Ailanthus altissima)
Penoxsulam	n/a
Sodium Carbonate Peroxyhydrate	Product examples: GreenClean™, PAK 27™, Phycomicyn™ Algae Filamentous Algae
Triclopyr TEA	Eurasian Watermilfoil (Myriophyllum spicatum) Purple Loosestrife (Lythrum salicaria L.) Variable-Leaf Milfoil (Myriophyllum heterophyllum) Water Primrose (Ludwigia hexapetala) Parrot Feather/Parrotfeather Milfoil (Myriophyllum aquaticum) Yellow Floating-Heart/Water Fringe (Nymphoides peltata) Water Primrose/Water Purslane (Ludwigia spp.)
Aluminum Sulfate/Sodium Aluminate	Phosphorus to reduce incidence of algae and blue-green algae blooms Includes buffering agents Note: alum is not registered as an algaecide, rather it works as an algaestat, helping to suppress algae blooms by inhibiting the nutrient phosphorous.)
Calcium Hydroxide/Oxide	Phosphorus to reduce incidence of algae and blue-green algae blooms Includes buffering agents Note: Calcium Hydroxide/Oxide is not registered as an algaecide, rather it works as an algaestat, helping to suppress algae blooms by inhibiting the nutrient phosphorous.)
Marker Dyes	Used to mark where herbicides have been applied during treatment.
Shading Products	Algae
Biological Water Clarifiers	n/a
Barley Straw	Algae

Aquatic Noxious Weed Control General Permit

Pesticide	Commonly Used to Control
2,4-D Amine	Knotweed Yellow-Flag Iris
Bispyribac-sodium	n/a
Carfentrazone-ethyl	n/a
Flumioxazin	n/a
Glyphosate	Cordgrass/Spartina (Spartina spp.) Knotweed spp. Phragmites Loosestrife spp. Yellow-Flag Iris Reed Canary Grass (Phalaris arundinacea L.)
Imazamox	n/a
Imazapyr	Cordgrass/Spartina (Spartina spp.) Knotweed spp. Phragmites Loosestrife spp. Yellow-Flag Iris Reed Canary Grass (Phalaris arundinacea L.)
Penoxsulam	n/a
Triclopyr TEA	Knotweed spp. Loosestrife spp.

Aquatic Mosquito Control General Permit

Pesticide	Commonly Used to Control
Bacillus sphaericus (H-5a5b)	Larva Mosquitoes
Bacillus thuringiensis israelensis	Larva Mosquitoes
Malathion	Adult, Larva Mosquitoes
Methoprene	Pre-emergent larval mosquito control
Monomolecular Surface Films	Larva, Pupa Mosquitoes
Parrafinic White Mineral Oil	Larva, Pupa Mosquitoes
Spinosad	Larva Mosquitoes
Temephos	Larva, Pupa Mosquitoes
Etofenprox	Adult Mosquitoes
Malathion	Adults, Larva, Pupa Mosquitoes
Naled	Adult Mosquitoes
Natural Pyrethrins	Adult Mosquitoes
Permethrin	Adult Mosquitoes
Piperonyl Butoxide (PBO)	Synergist, used in combinations with pyrethroids for better efficacy.
Prallethrin	Adult Mosquitoes
Resmethrin	Adult Mosquitoes
Sumithrin (d-phenothrin)	Adult Mosquitoes

Irrigation System Weed Control

Pesticide	Example Labels (PDF)
Endothall	Cascade (dipotassium salt of endothall) Teton (amine salt of endothall)
Acrolein	Magnacide H® Herbicide 2013 Special Local Needs (SLN) Label
Copper	K-Tea Algaecide Cutrine® Plus Alaecide/Herbicide Cutrine® Ultra Algaecide / Herbicide / Cyanobacteriocide
Fluridone	Sonar PR Herbicide Sonar SRP Herbicide Sonar Q Herbicide Sonar A.S. Herbicide
Imazapyr	Habitat Herbicide
Sodium Carbonate Peroxyhydrate	GreenClean Pro Algaecide
Xylene	Chem T Aquatic Weed Killer

Aquatic Invasive Species Management

Pesticide	Known Control Uses
Sodium Chloride	Caulerpa For marine and freshwater application.
Potassium Chloride	Zebra/Quagga Mussels For marine and freshwater application.
Chlorine compounds including: chlorine dioxide, sodium chlorite, sodium hypochlorite, and calcium hypochlorite	Invasive Tunicates (e.g.Didemnum spp.) Caulerpa For marine and freshwater application.
Acetic Acid	Tunicates biofouling organisms For marine and freshwater application.
Calcium Hydroxide/Oxide (lime) and carbon dioxide	Echinoderms biofouling organisms For marine and freshwater application.
Rotenone	Fish For freshwater application.
Antimycin-A	Fish For freshwater application.
Potassium Permanganate (KMnO4)	Zebra/Quagga Mussels Used to neutralize Antimycin-A and Rotenone For freshwater application.
Endothall mono-salt (e.g., Hydrothol 191™)	Mollusks Cyanobacteria For freshwater application.
Sodium Carbonate Peroxyhydrate	Algae Filamentous Algae For freshwater application.
Methoprene	Larval mosquitoes and midges For freshwater application.
Chelated copper compounds	Invasive invertebrates Zebra/Quagga Mussels For freshwater application.
Pseudomonas fluorescens strain CLO145	Zebra/Quagga Mussels For freshwater application.
Heating/cooling (temperature alteration)	n/a For marine and freshwater application.

Adjuvants and Surfactants

The adjuvants and surfactants listed here may not be available for use in all permits. Check the permit you have, or are planning to get, coverage under for the specific list of adjuvants and surfactants available in that permit.