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Extension > Agriculture > Crops > Weed management > Weed identification > Annual grass weed identification

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Annual grass weed identification

Gerald R. Miller, former Extension Agronomist
Oliver E. Strand, former Extension Agronomist
Reviewed 2014

Descriptions of annual grass weeds

Click on highlighted text or photo for larger image. Photos are from the Strand Memorial Herbarium, unless otherwise noted.

barnyardgrass
barnyardgrass

Barnyardgrass collar and leaf blade (above) and inflorescence (below).

Barnyardgrass
(Echinochloa crus-galli (L.) Beauv.)

Leaf sheath and blades

Ligule

Inflorescence

Spikelets

large crabgrass

Source: Steve Dewey, Utah State University, Bugwood.org

Crabgrass, large

Crabgrass, large
(Digitaria sanguinalis)

Leaf sheath and blades

Ligule

Inflorescence

Spikelets

Giant foxtail
Giant foxtail

Source: Joseph M. DiTomaso, University of California-Davis, Bugwood.org

Giant foxtail leaf blade (above) and head below

Foxtail, giant
(Setaria faberi)

Leaf blades

Ligule

Inflorescence

Spikelets

Green foxtail

Source: Ohio State Weed Lab Archive, The Ohio State University, Bugwood.org

Green foxtail

Foxtail, green
(Setaria viridis (L.) Beauv.)

Leaf blades

Ligule

Inflorescence

Spikelets

Yellow foxtail
Yellow foxtail head

Yellow foxtail collar (above) and head (below).

Foxtail, yellow
(Setaria pumila)

Leaf sheath and blades

Ligule

Inflorescence

Spikelets

Wild oat Wild oat seeds

Wild oat panicle (above) and seeds or grains (below)

Oat, wild
(Avena fatua)

Leaf sheath and blades

Ligule

Inflorescence

Spikelets

Fall panicum
Fall panicum spikelets

Fall panicum plant (above) and spikelets (below)

Panicum, fall
(Panicum dichotomiflorum Michx.)

Leaf blades

Ligule

Stems

Inflorescence

Spikelets

Wild proso millet
Wild proso millet

Wild proso millet leaf sheath (above) and panicle (below)

Proso millet, wild
(Panicum miliaceum L.)

Leaf sheath and blades

Ligule

Inflorescence

Spikelets

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