Top ten lists of most troublesome weed species in soybean for three states along the North-South transect.

Lists are generated by farmer surveys as reported by the Southern Weed Science Society (SWSS) for Louisiana (LA) and Missouri (MO) [37] and the University of Minnesota extension service for Minnesota (MN) (Frank Forcella, USDA-ARS Personal Communication). C3/C4 refers to photosynthetic pathway.
*Indicates herbicide resistant populations within that state.