Lambsquarters, common

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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

Locations of resistant populations:

Delaware, Illinois, Iowa, Maryland, Michigan, Minnesota, Kentucky, Pennsylvania, Tennessee, North Carolina, Virginia

Resources:

Common Lambsquarters – Weed ID Guide – University of Missouri

Lambsquarters Fact Sheet – HRAC

Management of Triazine Resistant Lambsquarters and Pigweed – Penn State University

Control of Lambsquarters in Corn and Soybean in Ohio – Ohio State University