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DESCRIPTION:
A common weed in turf, smooth crabgrass is a low-growing,
summer annual grass that spreads by seed and from rootings of the
joints that lie on the soil. Leaf blades are 1/4 to
1/3 inch (6 - 8 mm) wide, up to 5 inches (12.5 cm) long, and pointed.
The collar has a short membranous ligule and there are no auricles.
The leaf
sheath
and upper leaf surface are smooth, but a few hairs may be found
on the lower leaf surface. There may be a reddish tint at the base
of the leaf. It can be distinguished from large
crabgrass, D. sanguinalis, by its shorter, wider leaf
and lack of hairs.
See UC IPM's Crabgrass Pest
Note for more information.
Grass ID illustration.
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