Annual Weeds
SOWTHISTLE, ANNUAL and PRICKLY Sonchus oleraceus and Sonchus asper Life Cycle: Annual Plant Description: A summer annual with yellow flowers and very weak spines at the tip of the irregular toothed leaves. The tall bluish-green stems secrete a milky sap when cut. Flower heads mature into white, fluffy seed heads, although not ball-shaped like in dandelion. Generally found in disturbed areas of high traffic or over grazing. Treatment: Apply 16 to 20 fluid ounces of DuraCor ® herbicide or 20 to 32 fluid ounces of GrazonPD3 ™ herbicide per acre.
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