Torpedograss

Quick Facts

Scientific namePanicum repens
OriginOld World
IntroductionLate 1800s, forage grass
Aquatic communityEmergent
HabitatDry land to water six feet deep
DistributionStatewide
Management effortComplaint management
2012 public waters / plant acres:353 / 11,288

Environmental and Economic Concerns

  • Thick mats stop navigation and water movement
  • Displaces native plants in wet soils and shallow waters
  • Resists control due to extensive starch-laden rhizomes
  • Most widely dispersed invasive exotic plant in Florida public waters (present in 80%)
  • Rapid growth and spread on exposed wet soils
Panicum repens
Panicum repens
Panicum repens
Panicum repens

Management Options

 
BiologicalNone available
ChemicalGlyphosate, imazapyr
MechanicalHarvest floating mats
PhysicalDrawdown and burn prior to treating with herbicides; flood after treatments

Florida Fish & Wildlife Conservation Commission, Status of the Aquatic Plant Maintenance Program in Florida Public Waters, Annual Report – Fiscal Year 2007-2008.

Last updated: 13 May 2013