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Curly Leaf Pondweed, also known as
Curly cabbage or crisp pondweed, is a non-native aquatic invasive
species introduced from Europe. Curly-leaf is believed to spread
primarily by the transfer of turions, and on plant fragments
carried on trailered boats, personal watercraft, wildlife, etc.
In spring, curly-leaf pondweed can
form dense mats that may interfere with boating and other
recreation on lakes. Curly-leaf also can cause ecological problems
because it can displace native aquatic plants.
In midsummer, curly-leaf plants
usually die back, which results in rafts of dying plants piling up
on shorelines, and often are followed by an increase in phosphorus,
a nutrient, and undesirable algal blooms.
Like other aquatic
vegetation, the abundance of curly-leaf varies from year to year
depending on environmental conditions, such as winter snow depth,
and spring water clarity, which can affect its
Curly-leaf pondweed leaves are somewhat stiff and
crinkled, resembling lasagna noodles. They are approximately 1/2
inch wide and 2 - 3 inches long. The leaves are arranged
alternately around the stem. Leaves become denser at the end
Curly Leaf has small "teeth" visible along edge of
leaf. It begins growing in early spring before most other
pondweeds and dies back during midsummer.
The flower stalks, when present, stick up above the water
surface in June; appears reddish-brown in the water, but is
actually green when pulled out of the water and examined closely.
Easily confused with clasping leaf pondweed, which
has leaves with no "teeth" around their edges.
A. You can get after this plant early! Once
water temperatures are around fifty-five degrees or warmer and the
plant is viable.
A. Only once - it will not grow back the same
A. Generally within seven to ten days things
will be cleared up.
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