Palmer amaranth is a summer annual that spreads only by seed and is a member of the pigweed family. Key characteristics of Palmer amaranth is its petiole length, it has a leaf petiole that is as long as or longer than the leaf itself. The leaves are diamond shaped and are wider at the base. It has a very long slender inflorescence, which is easily spotted in cropland fields. Palmer amaranth is highly invasive in croplands and is often hard to control due to its size, herbicide resistance, and seed production. Palmer can be controlled with herbicides in non-cropland areas. However, infestations within cropland are best controlled using mechanical methods, such as cutting and burning.
Click on the picture for additional information.