Giant salvinia

Quick Facts

Scientific nameSalvinia molesta
OriginSouth America
Introduction1990s, horticulturists
Aquatic communityFloating
HabitatWater surfaces, quiescent waters
DistributionN & central FL lakes, SW FL canals
Management effortEradication 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
Salvinia molesta
Salvinia molesta

Management Options

BiologicalSouth American weevil, Cyrtobagous salviniae
ChemicalDiquat, fluridone, flumioxazin, glyphosate, penoxsulam
MechanicalNot feasible in current infestations
PhysicalDewatering, 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.

Last updated: 30 December 2014