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Aquatic weeds are plants that grows (usually too densely) in an area such that it hinders the usefulness or enjoyment of that area.  Some common examples of aquatic plants that can become weeds are the water milfoils, ribbon weeds, and pondweeds. Aquatic weeds cause obstructions to forest road crossings, water diversion structures, and water conveyance ditches that may lead to overtopping, erosion, reduced flow, and failure of structures.  They arechallenging to control due to limited ability to treat with herbicides in riparian areas and over water and difficulty accessing aquatic areas.

Aquatic Weeds

American Pondweed

Potamogeton nodosus

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American pondweed, Graves Lovell, Alabama Department of Conservation and Natural Resources, Bugwood.
American pondweed, Graves Lovell, Alabama Department of Conservation and Natural Resources, Bugwood.

American pondweed

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American pondweed, Graves Lovell, Alabama Department of Conservation and Natural Resources, Bugwood.
American pondweed, Graves Lovell, Alabama Department of Conservation and Natural Resources, Bugwood.

American pondweed

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Brazilian waterweed, William T. Haller, University of Florida, Bugwood.org
Brazilian waterweed, William T. Haller, University of Florida, Bugwood.org

Brazilian waterweed

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Brazilian waterweed, USGS , US Geological Survey, Bugwood.org
Brazilian waterweed, USGS , US Geological Survey, Bugwood.org

Brazilian waterweed

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Egeria densa

Typha latifolia

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Common cattail Joseph OBrien, USDA Forest Service, Bugwood.org
Common cattail Joseph OBrien, USDA Forest Service, Bugwood.org

Cattails

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Cattail, Steven Katovich, Bugwood.org
Cattail, Steven Katovich, Bugwood.org

Cattail

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Elodea canadensis

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Common waterweed, Rob Routledge, Sault College, Bugwood.org
Common waterweed, Rob Routledge, Sault College, Bugwood.org

Common waterweed

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Common waterweed, Rob Routledge, Sault College, Bugwood.org
Common waterweed, Rob Routledge, Sault College, Bugwood.org

Common waterweed

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Ceratophyllum demersum

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Coontail, Graves Lovell, Alabama Department of Conservation and Natural Resources, Bugwood.org
Coontail, Graves Lovell, Alabama Department of Conservation and Natural Resources, Bugwood.org

Coontail, Graves Lovell, Alabama Department of Conservation and Natural Resources, Bugwood.org

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Coontail, Graves Lovell, Alabama Department of Conservation and Natural Resources, Bugwood.org
Coontail, Graves Lovell, Alabama Department of Conservation and Natural Resources, Bugwood.org

Coontail

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Coontail, Graves Lovell, Alabama Department of Conservation and Natural Resources, Bugwood.org
Coontail, Graves Lovell, Alabama Department of Conservation and Natural Resources, Bugwood.org

Coontail

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Curly-leaved pondweed, Chris Evans, University of Illinois, Bugwood.org
Curly-leaved pondweed, Chris Evans, University of Illinois, Bugwood.org

Curly-leaved pondweed

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Curly-leaved pondweed, Chris Evans, University of Illinois, Bugwood.org
Curly-leaved pondweed, Chris Evans, University of Illinois, Bugwood.org

Curly-leaved pondweed

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Curly-leaved pondweed, Chris Evans, University of Illinois, Bugwood.org
Curly-leaved pondweed, Chris Evans, University of Illinois, Bugwood.org

Curly-leaved pondweed

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Potamogeton crispis

Lemna spp.

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Duckweed, Karan A. Rawlins, University of Georgia, Bugwood.org
Duckweed, Karan A. Rawlins, University of Georgia, Bugwood.org

Duckweed

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Duckweed, Steve Dewey, Utah State University, Bugwood.org
Duckweed, Steve Dewey, Utah State University, Bugwood.org

Duckweed

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Duckweed, Steve Dewey, Utah State University, Bugwood.org
Duckweed, Steve Dewey, Utah State University, Bugwood.org

Duckweed

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Myriophyllum spicatum

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Eurasian watermilfoil, Chris Evans, University of Illinois, Bugwood.org
Eurasian watermilfoil, Chris Evans, University of Illinois, Bugwood.org

Eurasian watermilfoil

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Eurasian watermilfoil, Chris Evans, University of Illinois, Bugwood.org
Eurasian watermilfoil, Chris Evans, University of Illinois, Bugwood.org

Eurasian watermilfoil

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Eurasian watermilfoil, Chris Evans, University of Illinois, Bugwood.org
Eurasian watermilfoil, Chris Evans, University of Illinois, Bugwood.org

Eurasian watermilfoil

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Myriophyllum spicatum

Zannichellia palustris

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Horned pondweed, Graves Lovell, Alabama Department of Conservation and Natural Resources, Bugwood.or
Horned pondweed, Graves Lovell, Alabama Department of Conservation and Natural Resources, Bugwood.or

Horned pondweed

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Hydrilla verticillata

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Hydrilla, Michael Frank, Galileo Group Inc., Bugwood.org
Hydrilla, Michael Frank, Galileo Group Inc., Bugwood.org

Hydrilla

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Hydrilla, Cleveland Metroparks, Bugwood.org
Hydrilla, Cleveland Metroparks, Bugwood.org

Hydrilla

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Hydrilla, David J. Moorhead, University of Georgia, Bugwood.org
Hydrilla, David J. Moorhead, University of Georgia, Bugwood.org

Hydrilla

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Chara spp.

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Muskgrass, Rebekah D. Wallace, University of Georgia, Bugwood.org
Muskgrass, Rebekah D. Wallace, University of Georgia, Bugwood.org

Muskgrass

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Najas spp.

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Naiad, Troy Evans, Great Smoky Mountains National Park, Bugwood.org
Naiad, Troy Evans, Great Smoky Mountains National Park, Bugwood.org

Naiad

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Naiad, Leslie J. Mehrhoff, University of Connecticut, Bugwood.org
Naiad, Leslie J. Mehrhoff, University of Connecticut, Bugwood.org

Naia

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Myriophyllum aquaticum

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Parrotfeather, Nancy Loewenstein, Auburn University, Bugwood.org
Parrotfeather, Nancy Loewenstein, Auburn University, Bugwood.org

Parrotfeather

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Parrotfeather, Nancy Loewenstein, Auburn University, Bugwood.org
Parrotfeather, Nancy Loewenstein, Auburn University, Bugwood.org

Parrotfeather

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Potamogeton pectinatus

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Potamogeton gramineus

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Naiad, Troy Evans, Great Smoky Mountains National Park, Bugwood.org
Naiad, Troy Evans, Great Smoky Mountains National Park, Bugwood.org

Naiad

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Naiad, Leslie J. Mehrhoff, University of Connecticut, Bugwood.org
Naiad, Leslie J. Mehrhoff, University of Connecticut, Bugwood.org

Naia

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Azolla filiculoides

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Waterfern, Robert Vidéki, Doronicum Kft., Bugwood.org
Waterfern, Robert Vidéki, Doronicum Kft., Bugwood.org

Waterfern

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Waterfern,Robert Vidéki, Doronicum Kft., Bugwood.org
Waterfern,Robert Vidéki, Doronicum Kft., Bugwood.org

Waterfern

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Wolffia

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Watermeal, Shaun Winterton, Aquarium and Pond Plants of the World, Edition 3, USDA APHIS PPQ, Bugwoo
Watermeal, Shaun Winterton, Aquarium and Pond Plants of the World, Edition 3, USDA APHIS PPQ, Bugwoo

Watermeal

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Watermeal, Graves Lovell, Alabama Department of Conservation and Natural Resources, Bugwood.org
Watermeal, Graves Lovell, Alabama Department of Conservation and Natural Resources, Bugwood.org

Watermeal

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Watermeal,Graves Lovell, Alabama Department of Conservation and Natural Resources, Bugwood.org
Watermeal,Graves Lovell, Alabama Department of Conservation and Natural Resources, Bugwood.org

Watermeal

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Ruppia spp

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Widgeonweed, Graves Lovell, Alabama Department of Conservation and Natural Resources, Bugwood.org
Widgeonweed, Graves Lovell, Alabama Department of Conservation and Natural Resources, Bugwood.org

Widgeonweed

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Widgeonweed, Graves Lovell, Alabama Department of Conservation and Natural Resources, Bugwood.org
Widgeonweed, Graves Lovell, Alabama Department of Conservation and Natural Resources, Bugwood.org

Widgeonweed

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Eichhornia crassipes

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Water hyacinth, Willey Durden, USDA Agricultural Research Service, Bugwood.org
Water hyacinth, Willey Durden, USDA Agricultural Research Service, Bugwood.org

Water hyacinth

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Water hyacinth, Chris Evans, University of Illinois, Bugwood.org
Water hyacinth, Chris Evans, University of Illinois, Bugwood.org

Water hyacinth

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Hydrocotyl spp.

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Water pennywort, USDA APHIS PPQ - Oxford, North Carolina , USDA APHIS PPQ, Bugwood.org
Water pennywort, USDA APHIS PPQ - Oxford, North Carolina , USDA APHIS PPQ, Bugwood.org

Water pennywort

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Water pennywort, Shaun Winterton, Aquarium and Pond Plants of the World, Edition 3, USDA APHIS PPQ,
Water pennywort, Shaun Winterton, Aquarium and Pond Plants of the World, Edition 3, USDA APHIS PPQ,

Water pennywort

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Ludwigia peploides

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Water primrose, Shaun Winterton, Aquarium and Pond Plants of the World, Edition 3, USDA APHIS PPQ, B
Water primrose, Shaun Winterton, Aquarium and Pond Plants of the World, Edition 3, USDA APHIS PPQ, B

Water primrose

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Water primrose, Shaun Winterton, Aquarium and Pond Plants of the World, Edition 3, USDA APHIS PPQ, B
Water primrose, Shaun Winterton, Aquarium and Pond Plants of the World, Edition 3, USDA APHIS PPQ, B

Water primrose

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