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Hortsense Home| Hortsense fact sheets | Weeds | Pineappleweed

Weeds

Annual bluegrass

Bentgrass, creeping

Bittercress (Shotweed, Hairy bittercress)

Bittersweet nightshade (European bittersweet)

Blackberry (Himalayan, Evergreen, Pacific)

Blue mustard (Purple mustard, Tenella mustard)

Brackenfern, western

Buttercup, creeping

Catchweed bedstraw (Cleavers)

Catsear, common (False dandelion)

Chickweed, common and mouseear

Dock (Curly, Broadleaf)

Downy brome (Cheatgrass, Downy chess)

Dwarf mistletoes

English daisy (Lawn daisy)

Field bindweed (Wild morningglory)

Field pennycress (Fanweed)

Foxtail (Green, Yellow, Bristly)

Garden loosestrife

Groundsel, common

Herb Robert (Robert geranium, stinky Bob)

Horsetails (Scouringrush)

Horseweed (Marestail)

Knotweeds (Bohemian, Giant, Japanese, Himalayan)

Lambsquarters, common

Mallow, common (Cheeseweed, Buttonweed)

Oxalis (Creeping woodsorrel)

Parrotfeather and Eurasian watermilfoil

Plantain (Broadleaf, Buckhorn)

Poison ivy and Poison oak

Prickly lettuce (China lettuce)

Prostrate knotweed

Puncturevine (Tackweed, Goathead)

Purple deadnettle (Red deadnettle)

Purple loosestrife (Purple lythrum)

Purslane, common

Red sorrel (Sheep sorrel)

Redroot pigweed (Rough pigweed)

Redstem filaree (Stork's bill, Crane's bill)

Reed canarygrass

Russian thistle (Tumbleweed)

Ryegrass, annual (Italian ryegrass)

Salsify (Goatsbeard)

Shepherd's-purse

Sowthistle, annual and perennial

Spurges (Prostrate spurges)

St. Johnswort, common (Goatweed, Klamathweed)

Stinging nettle

Tumblemustard (Jim Hill mustard)

Velvetgrass (Common velvetgrass)

Waterhemlock, western

Yellow nutsedge

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Caption: Pineappleweed

Photo by: T.W. Miller

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

IMPORTANT: Visit Home and Garden Fact Sheets for more information on using pesticides

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