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American lotus is also known as duck acorn, water nut and yellow
lotus. Aesthetically appealing; waterfowl eat the seeds; starchy
tubers (roots) can be eaten by humans. The large acorn like seed of
lotus is utilized by some ducks and other wildlife. Beavers
and muskrats consume the rhizomes. Small to moderate colonies of
this plant are considered beneficial to lakes and ponds.
Large colonies of American lotus
may restrict small boat navigation, fishing, and provide habitat
American lotus plants are often confused with water lilies. The
leaves of American lotus are simple, circular in shape and up to 2
feet in diameter. Each leaf is attached to rigid stem at the leaf's
Leaves are flat if floating or conical if emergent and can stand
above the water's surface as high as 3 1/2 feet. Flowers are large
(to 10 inches across) yellowish-white to yellow with more than 20
petals. Lotus can form large colonies and spreads by seeds and
large fleshy rhizomes.
The leaves that protrude above the
water often look like inverted umbrellas; the petiole (leaf stalk)
is attached to the center of the completely circular leaf; the
yellow flower contains many petals; acorn like seeds are housed in
a spongy, flat-topped structure.
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 and/or the plant is
actively flowering. American Lotus responds equally well to
herbicide treatment when mature.
A. Generally one to
two treatments per season is enough.
A. It really
depends on the product you choose. For most vegetation, control
will take approximately 2 weeks however, tissue damage may be
evident within 2 to 4 days with liquid formulations. Some
products are slower acting with results taking 30 days or more to
A. If roots are not
killed, regrowth may become evident within 4 to 5 weeks.
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