Common Lambsquarters

Note from the GROW team: This page is being updated in an effort to provide you with the most accurate and timely information. In the meantime, please visit the rest of our website to learn more about the tactics to manage herbicide-resistant weeds.

Photo Credit: University of Missouri

Common lambsquarters developed resistance to Group 5 herbicides (triazines) very early on in the history of herbicide resistance. It was first confirmed in the US in 1975 infesting corn, soybean, and nurseries. The species is very common throughout many regions of the US.

Herbicide resistant populations:

  • Group 5
  • Group 2
Image result for lambsquarters penn state

For more information on common lambsquarters management, visit:

Hero photo and Hero Circle photo credit: Claudio Rubione, University of Delaware

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Other Weeds

Giant Ragweed
Italian Ryegrass