Blacklist this Biosecurity Bandit

Seqwater and the Pine Rivers Catchment Association have recently detected Amazon Frogbit in Lake Kurwongbah and the South Pine River in South East Queensland.

Please sign the e-petition by clicking on the link to ban this noxious weed in Queensland.

A native to Central and South America, Amazon Frogbit (limnobium laevigatum) can rapidly invade and smother waterways and is a serious biosecurity threat. Adult plants can form into large mats of runners very quickly. Juvenile plants have a great capacity for distribution in that they are small and can be easily and quickly carried by water currents.

Mature plants can be mistaken for Water Hyacinth. An easy way to distinguish juvenile Frogbit from other aquatic species is by the leaves, which are often swollen on the underside (a bit like a sponge) and float lying flat on the water surface. As the leaves mature, they lose their spongy underside, become more oval shaped and can extend up to 50cm above the water.

Mature Frogbit

What are the major impacts of Frogbit?

Frogbit is a fast growing, floating freshwater weed that: 

  • forms large dense mats across the water’s surface
  • prevents native water plants from growing
  • reduces light, food and shelter for fish and other aquatic animals
  • can block waterways and irrigation channels
  • creates dangerous conditions by hiding the water surface and making it appear like firm ground
  • can limit recreational activities such as fishing, swimming, or boating.

A fact sheet can be found on the NT Government website

Please sign the e-petition to register your support to declare this species as a prohibited invasive plant under the Biosecurity Act 2014.


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