Biennial & Perennial Weeds
RAGWEED, WESTERN Ambrosia psilostachya Life Cycle: Perennial Plant Description:
An erect, bushy plant growing 1 to 2 feet tall. Leaves are silvery-green and usually covered with fine hairs. A deep, extensive root structure makes it extremely drought-hardy. It can produce more than 200 new shoots from a single plant. Infestations generally start in low areas of cropland and spread to higher ground. Treatment: Apply 16 to 20 fluid ounces of DuraCor ®
herbicide per acre or 1.5 to 2.1 pints of GrazonNext ® HL herbicide per acre. Apply in the spring to actively growing plants prior to flowering, usually from spring to early summer.
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