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Sago pondweed is an extremely important
aquatic plant in lakes and ponds because of its nutritional
value as a food source for birds, including waterfowl
(especially diving ducks and swans), marsh birds, and shorebirds.
The tubers and seeds are very nutritious, but leaves, stems and
roots are also eaten. Sago also provides food for amphibians,
reptiles, fish, and mammals. Sago beds provide habitat for a large
number of invertebrates, which in turn are an important food source
for young waterfowl.
Because its long rhizomes and runners
provide a strong anchorage in the substrate, sago pondweed helps
reduce erosion. The leaves provide shelter, support, and an
increased oxygen supply for many aquatic animals. Sago also acts as
a nutrient buffer by using dissolved nitrogen and phosphorus for
growth. This helps reduce algae blooms by making the nutrients
unavailable for the algae.
This plant can create dense stands that clog irrigation
canals and produce major problems for water flow and access, but it
is very important in natural habitats as a waterfowl food source.
Control should be used when the sago plant population is
creating significant problems.
Sago pondweed grows from thickly matted rhizomes.
All leaves are submerged below the water line and alternately
arranged on the steam.
Sago Pondweed leaves are highly branched, stiff, narrow
(about 1/16" wide) and thread-like (2" -12" or more in
length). Resembling pine needles, each leaf ends in a sharp
point. Spreading leaves resemble a fan with an overall bushy
appearance. Nutlets (approx. 18" - 14" long by 1/10" to 1/8" wide)
appear like beads on a string. Tiny green flower appears on a spike
along with nutlets above the water surface.
Sago Pondweed (Potamogeton pectinatus) has very fine slender
leaves. Multiple long thin leaves appear bushy beneath the water.
When removed from the water the plant will relax with little or no
A. Once water temperatures are around sixty degrees or warmer
and the plants are viable.
A. Generally, there is little regrowth within the same season.
Note that other aquatic species like the Naiad family grow later in
the season that may require a mid to later season treatment to
achieve season long clear water.
A. Generally within two weeks things will be cleared up.
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