Curly Leaf Pondweed

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Presentation on the invasive curly leaf pondweed.

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Curly Leaf Pondweed

  1. 1. Curly Leaf Pondweed 5/16/2012 Managing Aquatic Resources Since 1966
  2. 2. Aquatic Invasive Species Curly Leaf Pondweed Scientific Name: Potamogeton crispus L. Common Names: Curly Leaf Pondweed, Crisp Pondweed, Crimped Pondweed or Curled Pondweed
  3. 3. Distribution Native to Eurasia, Australia, and Africa Colonized Northeast United States in Mid 1800’s Was present in Midwest ponds and lakes by 1930’s Currently found in all continental states except Maine and S. Carolina
  4. 4. Description/Identification Alternate two ranked leaves Crisp textured leaves Leaf margins are wavy and toothed Distinct mid-vein Highly reduced flowers on aerial spikes Produce turions
  5. 5. Life Cycle Biology Cold/Cool water plant Active growth in winter Maximum density in late spring Falls dormant in early/mid summer
  6. 6. Life Cycle Biology Reproduces by turions, seeds, fragmentation, and rhizomes Forms turions in late spring Germination of turions is very high Turions remain viable for several years
  7. 7. Dispersal Mechanisms Boats, trailers, and other human assistance Waterfowl Currents
  8. 8. Impacts Reduced recreational activities Decrease in property value Disrupt navigation Trigger algae blooms in summer Trigger dissolved oxygen depressions
  9. 9. Viable ManagementTechniques/Control Options Education/Prevention Physical Removal? Biological? Chemical Control
  10. 10. Chemical Control Early Treatments Endothol  Aquathol  Aquathol Super K Fluridone  Sonar AS  Sonar Q Diquat  Reward  Weedtrine
  11. 11. Chemical Control Endothol Aquthol K: For whole lake treatments use 0.75 – 3.0 ppm (0.45 - 1.9 gallons per acre foot). For partial lake trements use 1.5 – 5 ppm (1.0 – 3.2 gallons per acre foot). Aquathol Super K: For whole lake treatment use 0.75 – 1.5 ppm (3.3 – 6.6 lbs. per acre foot). For partial lake treatments use 1.5 – 5 ppm (6.6 – 22.0 per acre foot). Best results in early to mid spring when water temperatures are between 55 and 70 degrees F.
  12. 12. Chemical Control Fluridone Sonar A.S. Aquatic Herbicide: Whole lake treatments only at 20 – 30 ppb total product application Sonar Q Aquatic Herbicide: Whole lake treatments only at 20 – 30 ppb total product application Perform FasTEST to confirm treatment concentration Early treatments most effective. Has shown excellent results in winter applications as a preventative in isolated cases. Do not use once the plants are mature and forming turions.
  13. 13. Chemical Control Diquat Reward: Use 1 - 2 gallons of Reward per acre of vegetation. Weedtrine D: Use 5 – 10 gallons Weedtrine D per acre of vegetation Best results in early to mid spring when water temperatures are between 55 and 70 degrees F.
  14. 14. Questions?Managing Aquatic Resources Since 1966

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