Revised November 2009

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IPM1007, Practical Weed Science for the Field Scout: Corn and Soybean

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Practical Weed Science for the Field Scout: Corn and Soybean

Cornflower (Centaurea cyanus)

Winter annual broadleaf

Cornflower
CornflowerAn erect winter annual with long white hairs and blue, white or pink flowers. Seedlings have cotyledons that are without hairs, but the first true leaves have hairs and a grayish appearance. Mature plants have leaves that are narrow, 2 to 6 inches long and less than 1 inch wide. Due to the leaf appearance, these plants are often confused for a grass. Leaves are alternate, linear in outline, and covered with long white hairs. Cornflower produces many solitary flower heads on long flower stalks. Individual flower heads are about 1 to 2 inches wide and blue to purple, white or pink in color.

Cornflower
 

IPM1007, revised November 2009

Wild thing
 

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IPM1007 Practical Weed Science for the Field Scout: Corn and Soybean | Page 34 | University of Missouri Extension