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 broadleaf
An erect summer annual that may reach as much as 6-1/2 feet in height. Cotyledons are narrow and have a reddish tint. First true leaves are alternate, ovate in shape, and are slightly notched at the tip of the leaf blade. Hairs may occur on the leaf margins and along veins, especially along the lower leaf surfaces. Stems also have short hairs especially near the upper portions of the plant. Mature plants have leaves that are alternate, ovate in outline, with petioles that reach 1/2 inch in length. Flowers are inconspicuous and produced in dense, compact terminal and axillary panicles that are prickly to the touch.
IPM1007, revised June 2007