
Yellow woodsorrel (Oxalis stricta) is an upright, herbaceous perennial with hairy stems. Leaves are alternate, divided into three partly folded, deeply cut, heart-shaped lobes. Flowers are bright yellow with five petals on stalks bent below the fruit and attaching to a common point. Fruit are narrow, "okra-like" capsules. Florida yellow woodsorrel (O. florida) is similar in appearance to yellow woodsorrel, but has slenderer stems, larger leaves, and a smooth to sparingly hairy, smaller capsule. Reproduction occurs via seed.
(Always refer to the label for specific uses, application rates and turfgrass tolerance)
Preemergence: atrazine, isoxaben, oxadiazon
Postemergence: atrazine, bromoxynil, carfentrazone, 2,4-D+dicamba, dicamba, imazaquin, metsulfuron, metribuzin, sulfentrazone, triclopyr
Preemergence: atrazine, isoxaben, oxadiazon
Postemergence: atrazine, bromoxynil, carfentrazone, 2,4-D+dicamba (follow label recomendations to minimize turf injury), imazaquin, metsulfuron, sulfentrazone
Preemergence: atrazine, isoxaben
Postemergence: atrazine, bromoxynil, carfentrazone, 2,4-D+dicamba, dicamba, imazaquin, mesotrione, metsulfuron, clopyralid, sulfentrazone
Preemergence: isoxaben
Postemergence: bromoxynil, carfentrazone, 2,4-D+dicamba, dicamba, triclopyr, sulfentrazone
Preemergence: oxadiazon
Postemergence: carfentrazone, sulfentrazone
Preemergence: atrazine, isoxaben, oxadiazon
Postemergence: atrazine, bromoxynil, carfentrazone, 2,4-D+dicamba, dicamba, imazaquin, metsulfuron, triclopyr+clopyralid, sulfentrazone
Preemergence: oxadiazon
Postemergence: bromoxynil, carfentrazone, 2,4-D+dicamba, dicamba, triclopyr, sulfentrazone
Refer to the publication Pest Control Guide for Turfgrass Management at turf.ufl.edu for brand names associated with chemical names listed.
This document is ENH1124, one of a series of the Environmental Horticulture Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Original publication date June 29, 2009. Adapted from: Tim R. Murphy, Daniel L. Colvin, Ray Dickens, John W. Everest, David Hall, and L.B. McCarty. Weeds of Southern Turfgrasses. University of Florida, 1992. Visit the EDIS Web Site at http://edis.ifas.ufl.edu.
J. Bryan Unruh, associate professor, Environmental Horticulture Department; Darcy E. Partridge-Telenko, postdoctoral research associate; and Barry J. Brecke, professor, Agronomy Department; West Florida Research and Education Center, Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, 32611.
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