Lambsquarters (Chenopodium album ) is a rapid growing summer annual weed. It emerges throughout the summer, with peak emergence in mid- to late spring. Mature C. album plants have broadly triangle-shaped leaves with irregular, shallow-toothed margins and a white mealy coating. It's stems are smooth or hairless, grooved, and green or reddish in color. It has tiny green to gray-green flower clusters at the tips of stems and branches which eventually turn into its seeds. C. album seeds are able to remain dormant for extended periods of time. C. album is extremely hardy and thrives on many types of soil and at many pH levels. It is one of the last weeds to be killed by frost, and its presence is one of the best indicators of good soil.
C. album is able to generate high levels of oxalates.
- difficulty breathing
- weak heart rate
MANUAL CONTROL: Lambsquarters is best controlled when small. Can be effectively controlled with timely mowing and proper pasture management
CHEMICAL CONTROL: Lambsquarter can be extremely difficult to control with postemergence herbicides. The wax on the leaf surface slows herbicide movement into the leaf. It is also resistant to triazine and ALS herbicides. It is suspected to have become resistant to glyphosate, but it is yet to be confirmed.
- Lopez, T.; Odriozola, E. R.; Cseh, S. [Toxicological aspects of Chenopodium album.] Veterinaria Argentina, 5(43), 230, 231-236 (1988)
- Cheeke, P. R.; Shull, L. R. Metal-binding substances and inorganic toxicants. Cheeke PR, Shull LR (eds.) Natural toxicants in feeds and poisonous plants. (1985)
- Cooper, M. R., Johnson, A. W. Poisonous plants in Britain and their effects on animals and man. Her Majesty's Stationery Office, London, England. 305 pp. (1984)