Brazilian Elodea Egeria densa       Darren R. ThornhillFisheries Management Biologist   MO Dept. of Conservation      3500...
What does it look like?• Submerged, perennial plant• Stems (up to 2 m) branch at water level• Whorls of 4-8 spear-shaped l...
Ecology• All known plants in the US are male  – Spreads through fragmentation• Found in still and moving water• Found in d...
How did it get here?• Native of Brazil and coastal Argentina and  Uruguay• First collected in Long Island, NY in 1893  – F...
How do we get rid of it?•   Prevention is paramount!•   Biological control with grass carp•   Mechanical control is not re...
Brazilian Elodea
Brazilian Elodea
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Brazilian Elodea

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Brazilian Elodea

  1. 1. Brazilian Elodea Egeria densa Darren R. ThornhillFisheries Management Biologist MO Dept. of Conservation 3500 S Baltimore St. Kirksville, MO 63501
  2. 2. What does it look like?• Submerged, perennial plant• Stems (up to 2 m) branch at water level• Whorls of 4-8 spear-shaped leaves (1.2-3.8 cm)• Three white flowers (18-25 mm) at or just above water surface
  3. 3. Ecology• All known plants in the US are male – Spreads through fragmentation• Found in still and moving water• Found in depths ranging up to 7 meters – Also found in free-floating mats• Develops dense, monotypic stands
  4. 4. How did it get here?• Native of Brazil and coastal Argentina and Uruguay• First collected in Long Island, NY in 1893 – First sold in US in 1915 as good “oxegenator”• Commonly cultivated and sold for the aquarium trade – Anacharis
  5. 5. How do we get rid of it?• Prevention is paramount!• Biological control with grass carp• Mechanical control is not recommended• Chemical control is effective – Complexed copper and diquat (effective) – Complezed copper and Endothall (marginally effective) – Fluridone (effective)
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