WSU Extension

Hortsense

Weeds : Pineappleweed : Matricaria discoidea
(revision date: 4/5/2016)

Family: Asteraceae (Compositae)
Cycle: Annual
Plant Type: Broadleaf

Use Integrated Pest Management (IPM) for successful weed management.

Biology
Pineappleweed grows to over one foot in height, with leaves finely divided into narrow, feathery segments. Cone-shaped or rounded yellow-greenish flowers are produced singly at the ends of branches. Each flower head is surrounded by several overlapping bracts with papery edges. Pineappleweed has no ray flowers. It gives off a strong pineapple odor when crushed. Mayweed chamomile (Anthemis cotula) looks similar, but has a repulsive odor and white ray flowers.
Habitat
Pineappleweed is native to North America, and commonly occurs along roadsides, in gardens, and in cropland.

Management Options

Non-Chemical Management
  • Reduce weed infestation by handpulling weeds.
  • Careful digging is useful to manage weed populations. However, digging can carry undesirable weed seed to the surface and foster further germination.
Select non-chemical management options as your first choice!

Chemical Management

Apply according to label instructions. Not a problem in healthy established turf. Glyphosate products should be applied as spot treatments only! NOTE: Some ingredients listed here are only available in combination. Read the label carefully on combination products to make sure the product is suitable for your specific situation.

Landscape areas
  • glyphosate
Turf areas
    Bare ground areas
    • glyphosate
    Images
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    Caption: Pineappleweed
    Photo by: T.W. Miller
    Caption: Pineappleweed
    Photo by: D.G. Swan
    Caption: Pineappleweed flowers
    Photo by: J.A. Kropf
    Caption: Pineappleweed heads
    Photo by: T. W. Miller
    Caption: Pineappleweed seedling
    Photo by: T. W. Miller