Stinking Mayweed

Anthemis cotula
Family: Asteraceae

Growth Habit: A small erect herb that emits a strong odour when brushed.

Type of Plant: Stinking mayweed is an annual.

Flowers: Stinking mayweed has a daisy-like flower, yellow in the centre which is surrounded by white florets.

Fruit/Seed: The majority of seeds are produced through spring and summer, although as the plant may grow at any time of the year, seed production occurs throughout the year.

Dispersal: Reproduces by seed. The plant germinates mainly in Autumn and Spring but it can germinate any time in the year if there is plenty of moisture.

Distribution: This weed is located on roadsides, cultivated paddocks and waste places.

Status: Secondary in Tasmania.

Weed Impact:

  • Stinking mayweed contaminates animal products if ingested, although it is seldom eaten due to its pungent nature.
  • May cause poisoning in poultry.
  • Possibly causes human dermatitis.

For further information contact the Department of Primary Industry, Water and Environment, Tasmania.

Control Methods:

  • Grubbing. Isolated plants and small infestations can be removed using hand tools.
  • Pasture management (all year). Maintaining a vigorous pasture and avoiding overgrazing will help control stinking mayweed.
  • Herbicides (summer). Spot spray for smaller patches and boom spray for larger areas. Herbicides registered in Tasmania include 2,4-D, MCPA and glyphosate.

N.B. Always check the herbicide label before use.