Invasive plants references

Candidate Organisms

Differential Distribution (i.e. present on the mainland and not Torres Strait, present in PNG and not Torres Strait or limited distribution across Torres Strait islands (TSI))

National Significance

Siam weed (Chromolaena odorata and Chromolaena squalida)

Preset in PNG and localised infestations on mainland Australia but absent from TSI.

Siam weed is a restricted invasive plant under the Biosecurity Act 2014. It must not be given away, sold, or released into the environment without a permit. The Act requires everyone to take all reasonable and practical steps to minimise the risks associated with invasive plants and animals under their control. Siam weed was first identified in Australia in 1994 as
several large infestations along the Tully River and at Bingil Bay in Far North Queensland. Siam weed infestations have also be found in the Townsville, Mossman, Innot Hot Springs, Mount Garnet areas, and an isolated infestation of Siam weed has also been found near Rockhampton. https://www.daf.qld.gov.au/__data/assets/pdf_file/0015/50028/IPA-Siam-Weed-PP49.pdf

Flammable grasses, especially gamba grass (Andropogon gayanus) and thatch grass (Hyparrhenia rufa).

Gamba grass is present on mainland (CYP and Atherton Tablelands), not Torres Strait

Gamba grass is a restricted invasive plant under the Biosecurity Act 2014. https://www.daf.qld.gov.au/__data/assets/pdf_file/0011/67466/IPA-Gamba-Grass-PP147.pdf


WONS. Thatch grass under management at Badu quarry and has potential to spread from there.

Leucaena leucocephala

Abundant on mainland and some TSI. Well established ( but being controlled) on many outer inhabited islands and some uninhabited islands, including the inner group of islands.

Opportunity to eradicate from the region.
Leucaena is not a prohibited or restricted invasive plant under the Biosecurity Act 2014. https://www.business.qld.gov.au/industries/farms-fishing-forestry/agriculture/land-management/health-pests-weeds-diseases/weeds-diseases/invasive-plants/other/leucaena

Pond apple (Annona glabra)

Present on TSI and under active management.

Pond apple is a restricted invasive plant under the Biosecurity Act 2014.
https://www.business.qld.gov.au/industries/farms-fishing-forestry/agriculture/land-management/health-pests-weeds-diseases/weeds-diseases/invasive-plants/restricted/pond-apple

Spiked pepper (Piper aduncum)

Present in Papua New Guinea and other Pacific and South-East Asian countries.

Yes - on the interim national priority list of exotic environmental pests and diseases and on the NAQS target list. http://www.agriculture.gov.au/biosecurity/australia/naqs/naqs-target-lists/spiked_pepper


Prohibited invasive plant in Queensland https://www.daf.qld.gov.au/__data/assets/pdf_file/0019/72253/IPA-Prohibited-invasive-plants.pdf

Yellow bells (Tecoma stans)

Present on all Torres Strait Islands

Yellow bells is a restricted invasive plant under the Biosecurity Act 2014. https://www.business.qld.gov.au/industries/farms-fishing-forestry/agriculture/land-management/health-pests-weeds-diseases/weeds-diseases/invasive-plants/restricted/yellow-bells

Neem tree (Azadirachta indica)

Limited distribution across TSI.Spreading quickly on inner islands, particularly POW.

https://www.daf.qld.gov.au/__data/assets/pdf_file/0006/63168/IPA-Neem-Tree-Risk-Assessment.pdf

Mikania (Mikania micrantha)

Present on mainland Australia but absent from TSI.

Yes - on the interim national priority list of exotic environmental pests and diseases.
Mikania vine is a restricted invasive plant under the Biosecurity Act 2014. The Act requires that all sightings of mikania vine plants must be reported to Biosecurity Queensland within 24 hours of the sighting. Mikania vine was first found in Australia in 1998 at Ingham and Bingil Bay, and has since been detected at one location near Speewah, near Mareeba. Populations of mikania vine have been detected in the Hinchinbrook, Cassowary Coast, and Tablelands Regional Council areas of north Queensland. https://www.daf.qld.gov.au/__data/assets/pdf_file/0011/75539/IPA-Mikania-Vine-PP143.pdf

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