curly pondweed potamogeton crispus
Post on 23-Feb-2016
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Curly PondweedPotamogeton crispus
Paul P. Dunay IIIKeystone College
ENVT 315Fall 2012
Distribution in United States and Canada
Introduction
• Native to Eurasia, Africa, Australia• Possibly introduced as an aquarium
ornamental or accidentally• Introduced into U.S in mid-1800s• Noxious or prohibited weed in several areas of
the USA: AL, CT, WA, VT
Plant Identification
• Potamogetonaceae• Leaves are typically finely
serrated along the edges• Edges of mature leaves may
be distinctly ruffled• Unique vein pattern• Inconspicuous flowers with
four petal-like lobes on spikes
Characteristics
• Submerged plant species• Fast growing perennial• Grows well in sandy, loamy and clay soils• Cold-tolerant evergreen and will grow through
winter• Low-light adapted• Established early and either avoids competition
or out-competes other macrophytes
Control Measures
• Turions are easily transportable and can remain dormant for up to 2 years
• Mechanical harvesting may be used to obtain some nuisance relief
• P. crispus is sensitive to 2,4-D, especially during early spring
• The herbicides fluridone and diquat have also been used
References
• USDA - http://www.invasivespeciesinfo.gov• USDA Plants - http://plants.usda.gov• Invasive Species Compendium - http://www.cabi.org
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