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.
Infestations can be minimised by maintaining healthy, dense pastures.
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.
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The requirements in the Noxious Weeds Act 1993 for a notifiable weed must be complied with