Annual ragweed (Ambrosia artemisiifolia)



Annual ragweed is an introduced weed from North America that invades roadsides, wastelands and poor or overgrazed pastures. The pollen from this plant is a major cause of hay fever and can aggravate asthma. Contact with the plant can also cause skin allergies.

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Infestations can be minimised by maintaining healthy, dense pastures.

Biological control

Two biological control agents have been released for annual ragweed in New South Wales. A moth (Epiblema strenuana) is established and has a reasonable impact on annual ragweed. A beetle (Zygogramma bicolorata) is established and widespread, and has a significant impact at some sites.  

Herbicide options

Contact your local council weeds officer for control advice for Annual ragweed (Ambrosia artemisiifolia).

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Legal requirements

The content provided here is for information purposes only and is taken from the Noxious Weeds Act 1993.

Area Class Legal requirements
All of NSW 5 Restricted Plant
The requirements in the Noxious Weeds Act 1993 for a notifiable weed must be complied with

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For technical advice and assistance with identification please contact your local council weeds officer.
For further information call the NSW Invasive Plants and Animals Enquiry Line on 1800 680 244 or send an email to

Reviewed 2014