Oklahoma State University
Stillwater, OK

Oklahoma Alfalfa
Oklahoma Cooperative Extension Service
Oklahoma Agricultural Experiment Station

Lambsquarters
COMMON NAME: Lambsquarters
SCIENTIFIC NAME: Chenopodium spp. (see below)
TYPE: Annual Warm-season Broadleaf Weed
DESCRIPTION                                                                        
    Germination: March to May.
    Reproduction: By seeds in June to August.
    Stems: Plants with smooth grooved stems with many axillary stems at top of plant.
    Leaves: Alternate, 1 to 3 inches (2.5 to 7.5 centimeters) long, smooth, usually white mealy-coated, especially on underside and in early stages, and with edges more or less toothed.  Leaves of common lambsquarters are rounded to triangular while leaves of Slimleaf are linear-lanceolate.
Flowers/
Inflorescence:		 Seeds formed in upper leaf axils and on terminals of both species.
Fruit: Utricle with star shaped calyx covering the seed.

FOUND:

 Common and slimleaf Lambsquarters are common and both can be a problem with spring planted alfalfa.

CONTROL:

 Good control of lambsquarters is possible with application of BUTYRAC 200 applied to plants in the seedling stage. Some control of small plants may be obtained with the use of PURSUIT.
Common Lambsquarters
Chenopodium album L.
tn_lambsqurtr-06_jpg.jpg (1561 bytes)
Plant		 tn_comm-lambsqrtr-01_jpg.jpg (1636 bytes)
Plant		 tn_lambsq-468_jpg.jpg (1704 bytes)
Leaf		 tn_lambsqurtr-05_jpg.jpg (1736 bytes)
Plant		 tn_cm-lambsquarters-031_jpg.jpg (1932 bytes)
Plant

Additional Common Lambsquarters Images
Slimleaf Lambsquarters
Chenopodium leptophyllum (Moq.) Nutt. ex S. Wats.
In Alfalfa Plant tn_slim-lamb-029_jpg.jpg (1683 bytes)
Leaf		 tn_slim-lamb-025_jpg.jpg (1847 bytes)
Plant		 tn_slimleaf-lamb-02_jpg.jpg (1137 bytes)
Seed Head

Additional Slimleaf Lambsquarters Images
Jim Stritzke
Former Alfalfa Weed Control Specialist
Department of Plant and Soil Sciences
Oklahoma State University

oces_o.gif (1925 bytes)

 

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