IPMP3.0, Oregon State University, Copyright 2000

Chenopodiaceae (Chenopodium album)


Biology and Management

Registered Herbicides

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Lambsquarter Seedling (link to large image)

Lambsquarter Flfowers (link to large image)

Lambsquarter Seedling Lambsquarter Flowers

Lamsquarter Mature Plant (link to large image)

Lambsquarter is an annual weed found in cultivated and waste areas throughout the United States. It is common in most horticultural crops and in sugarbeets, potatoes, mint, wheat, alfalfa and dry bean. This weed grows upright 1 to 4 feet tall with many branches. The leaves have a wavy or coarsely toothed margin with a soft gray or white mealy coating on young leaves and underside of mature leaves. The flowers are inconspicuous gray-green in dense clusters in leaf axils and branch tips.  This is a rapid growing weed with high water use and is very competitive in most situations. This weed acts as a host for beet leafhopper, which transmits curly top virus to beets.

Lambsquarter Mature Plant


This section contains information on identification of the different life stages of Lambsquarter.  Select Biology and Management from the Contents Menu for more information on the biology and management, or select Registered Herbicides for the herbicides that are registered to control this weed in mint.