Marsh plume thistle (Cirsium palustre)

Marsh plume thistle

(Cirsium palustre)

Description

  • Purple or reddish flowers found on the end of the single, often unbranched stem
  • Stems and leaves are spiny and hairy

Consequences of invasion

  • Invades moist to wet areas
  • A furious competitor against tree seedlings and native vegetation
  • Reduces biodiversity

How is it introduced? How does it spread?

  • Transported by vehicles and machinery
  • Seeds travel by means of the water that the plant grows in
  • Naturally by wind and animals

Integrated Pest Management Options

  • Minimize soil disturbances and occupy disturbed spaces by planting native vegetation instead
  • Clean equipment before leaving an infested area
  • Before flowering: pull or mow and leave to decompose on site
  • With flower present, manual treatment is still effective but the seed heads must be bagged and properly disposed of at your local landfill

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