Annual Ragweed

This week's weed is annual ragweed. It is classified as a RESTRICTED species. It is a fast-growing fern-like annual herb that invades and suppresses pasture land.

WHAT TO LOOK FOR

  • Annual herb 1-2 m tall
  • Leaf blades are fern-like, deeply divided with hairy undersides
  • Flowers are small, clustered, greenish-yellow erect spikes
  • Leaves initially grow in a rosette at plant's base
  • Leaves are oppositely arranged at the base of the plant, but are alternately arranged further up the stems.

WHY IT'S BAD

  • Invades and suppresses pastures
  • Colonises bare areas on roadsides and creek banks
  • Pollen can cause hay fever and aggravate asthma in people.

LOOKS SIMILAR TO

  • Parthenium (also RESTRCITED)

WHAT TO DO

  • This plant must NOT be given away, sold, or released into the environment. Penalties may apply.
  • Please report any sightings of this plant to council for advice on control options.

MORE INFORMATION

https://www.business.qld.gov.au/.../restri.../annual-ragweed

 

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