giant salvinia biological control update
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Giant Salvinia Biological Control Update Dewey W. Murray USDA, - PowerPoint PPT Presentation

United States Department of Agriculture Animal and Plant Health Inspection Service Plant Protection and Quarantine Giant Salvinia Biological Control Update Dewey W. Murray USDA, APHIS, PPQ Phoenix, Arizona United States Department of


  1. United States Department of Agriculture Animal and Plant Health Inspection Service Plant Protection and Quarantine Giant Salvinia Biological Control Update Dewey W. Murray USDA, APHIS, PPQ Phoenix, Arizona

  2. United States Department of Agriculture Animal and Plant Health Inspection Service Plant Protection and Quarantine Classical cal b biologi ogical cal c control ol W eed population/ im pacts Release of CBC agent( s) OLD POP’N EQUI LI BRI UM ( Dam age threshold) NEW POP’N EQUI LI BRI UM I ntroduction of pest Tim e (from Hansen 2007, USDA, APHIS, CPHST)

  3. United States Department of Agriculture Animal and Plant Health Inspection Service Plant Protection and Quarantine Annual Totals of Cyrtobagous salvinia Released on the Lower Colorado River 100000 86558 Estimated # Individuals Released 90000 80000 70000 60000 50000 40000 30000 18963 20000 3500 3247 1248 10000 0 0 2003 2004 2005 2006 2007 2008 Year

  4. United States Department of Agriculture Animal and Plant Health Inspection Service Plant Protection and Quarantine August 2007 River mile 33 August of 2004. River mile 33 in summer of 2005. Salvinia population infested with Cyrtobagous salvinia. Notice the brown coloration from decaying plant biomass.

  5. United States Department of Agriculture August 2007 Animal and Plant Health Inspection Service Plant Protection and Quarantine August 2004

  6. United States Department of Agriculture Animal and Plant Health Inspection Service Plant Protection and Quarantine

  7. United States Department of Agriculture Animal and Plant Health Inspection Service Plant Protection and Quarantine

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