Many ant species may be present in field crops, feeding on seeds or leaf tissue; other species are predaceous.
A unique association exists between ants and aphids, particularly soybean aphids. Ants are often found on soybean plants in infested fields. Many assume the ants are eating the aphids; instead, the ants are actually tending the aphids, protecting them from predators. The ants feed on the sweet honeydew secreted by aphids.