Oklahoma State University
Stillwater, OK

Oklahoma Alfalfa
Oklahoma Cooperative Extension Service
Oklahoma Agricultural Experiment Station

Common Ragweed

COMMON NAME: Common Ragweed
SCIENTIFIC NAME: Ambrosia artemisiifolia L.
TYPE: Annual Warm-season Broadleaf Weed
DESCRIPTION                                    
    Germination: April to July.
    Reproduction: By seeds August to October.
    Stems: Rough, hairy, erect, branched, 1 to 4 feet tall.
    Leaves: Nearly smooth, deeply cut into a number of lobes.
Flowers/
Inflorescence:
Male and female flowers separated.  Male flowers on Catkin-like branches, female flowers in axils at upper leaves.
Fruit: Woody achene (seed) resembling crown.

FOUND:

Common ragweed is found in old pastures, wasteland, roadsides, stubble fields, and cultivated land. It can be a weed problem in spring planted alfalfa since it would be competitive with seedling alfalfa.

CONTROL:

Ragweeds can be selectively removed from alfalfa seedlings with early post treatment of , BUTYRAC 200 and PURSUIT.
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Plant
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Plant
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Leaf
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Plant
Seed Head
Additional Common Ragweed Images
Jim Stritzke
Former Alfalfa Weed Control Specialist
Department of Plant and Soil Sciences
Oklahoma State University

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