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Black ducks, gadwall, mallards,
northern pintails, and other waterfowl graze the fruit and foliage
of Horned Pondweed. Horned Pondweed is also a fantastic food
producer for trout.
Dense populations of plants
reduce the water temperature and oxygen concentrations when plants
die in late summer. Horned Pondweed may form dense mats
blocking sunlight for other submersed vegetation along with
interfering with fishing, boating and swimming.
Horned pondweed has long, linear, thread-like leaves. They are
arranged in whorls on slender branching stems. Leaf tips taper to a
point. It has tendril-like roots and slender rhizomes. The seeds
are horn-shaped and form in the leaf axils.
Sago pondweed (Studkenia
pectinata) and widgeon grass (Ruppia maritima)
are similar in appearance to horned pondweed. Sago pondweed,
however, has leaves in bushy clusters, and widgeon grass has
alternate leaves, whereas horned pondweed has opposite or whorled
A. Spot treat as
needed to maintain navigation channels and swimming areas. Remember
this plant is very beneficial and should not be treated where it is
not a nuisance.
A. Once water
temperatures are around sixty degrees or warmer however this plant
responds equally well to herbicide treatment when mature.
A. One treatment
per season is usually enough.
within two to three weeks things will be cleared up.
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