Giant salvinia

Quick Facts

MORE INFO
Scientific name Salvinia molesta
Origin South America
Introduction 1990s, horticulturists
Aquatic community Floating
Habitat Water surfaces, quiescent waters
Distribution N & central FL lakes, SW FL canals
Management effort Eradication in several locations
2014 public waters / plant acres: 0 / 0

Environmental and Economic Concerns

  • Grows rapidly and reproduces by vegetative fragments
  • Dense infestations block navigation, cover native plants, and clog irrigation pipes
  • Reduces oxygen content in water which can lead to fish kills
  • Considered one of the world’s worst weeds
  • Under FWC eradication programs in four pond / ditch systems in Florida
Salvinia molesta
Salvinia molesta

Management Options

 
Biological South American weevil, Cyrtobagous salviniae
Chemical Diquat, fluridone, flumioxazin, glyphosate, penoxsulam
Mechanical Not feasible in current infestations
Physical Dewatering, hand picking surviving plants after herbicide application in small pond eradication sites

Florida Fish & Wildlife Conservation Commission, Status of the Aquatic Plant Maintenance Program in Florida Public Waters, Annual Report – Fiscal Year 2009-2010.