Revised June 2007
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Contents
Summer annual broadleaf
Biennial broadleaf
Perennial broadleaf
Summer annual grass
Winter annual grass
Perennial grass
Plants resembling grasses
Herbicides
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Practical Weed Science for the Field Scout: Corn and Soybean
Summer annual grass
A summer annual with stems radiating outward from a central, distinctive white center. Seedlings have a first leaf that is 3 to 5 times longer than it is wide, which opens parallel to the ground. Leaf sheaths are flattened, smooth and even on seedlings are distinctly white to silver at the base. Mature plants have leaf blades that are 2 to 14 inches long, 3 to 8 mm wide, without hairs or only sparsely hairy, and folded along the midvein. The ligule is 1 to 2 mm long, fringed, uneven and membranous. Sheaths are flattened, whitish at the base and sparsely hairy in the collar region. Seedheads are composed of 2 to 13 spikes, each 1-1/2 to 6 inches long in clusters at the end of stems.
IPM1007, revised June 2007