Weed, Insect and Disease Control
Virginia buttonweed (Diodia virginiana) is one of the most difficult-to-control broadleaf weeds in turf. It commonly proliferates in poorly drained areas and can tolerate mowing heights as low as one-half inch. This deep-rooted perennial produces both above- and below-ground flowers. Its prolific seed production, extensive root system and ability to vegetatively reproduce make control extremely difficult.
"W147-Virginia Buttonweed," The University of Tennessee Agricultural Extension Service, W147-2/09 09-0161, http://trace.tennessee.edu/utk_agexturf/5