Yellow Woodsorrel (Oxalis) Biology and Management in Turf1
Yellow woodsorrel (Oxalis stricta) is an upright, herbaceous perennial with hairy stems. Leaves are alternate and divided into three partly folded, deeply cut, heart-shaped lobes. Flowers are bright yellow with five petals on stalks bent below the fruit and attached 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.
Herbicide Options for Controlling Yellow Woodsorrel in Florida Turfgrass
(Always refer to the label for specific uses, application rates, and turfgrass tolerance)
Bermudagrass
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Preemergence: dithiopyr, indaziflam, isoxaben, napropamide, oxadiazon, pendamethalin, prodiamine+isoxaben
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Postemergence: bromoxynil, carfentrazone, 2,4-D+dicamba, dicamba, imazaquin, metsulfuron, metribuzin, penoxsulam+sulfentrazone+dicamba+2,4-D, sulfentrazone, sulfentrazone+quinclorac, thiencarbazone+iodosulfuron+dicamba, thiencarbazone+floramsulfuron+halosulfuron, triclopyr +clopyralid, trifloxysulfuron
St. Augustinegrass
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Preemergence: atrazine, dithiopyr, indaziflam, isoxaben, napropamide, oxadiazon, pendamethalin, prodiamine+isoxaben
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Postemergence: atrazine, bromoxynil, carfentrazone, 2,4-D+dicamba (follow label recommendations to minimize turf injury), imazaquin, metsulfuron, penoxsulam+sulfentrazone+dicamba+2,4-D, sulfentrazone, thiencarbazone+iodosulfuron+dicamba
Centipedegrass
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Preemergence: atrazine, dithiopyr, indaziflam, isoxaben, napropamide, pendamethalin, prodiamine+isoxaben
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Postemergence: atrazine, bromoxynil, carfentrazone, clopyralid, 2,4-D+dicamba, dicamba, imazaquin, mesotrione, metsulfuron, penoxsulam+sulfentrazone+dicamba+2,4-D, sulfentrazone, sulfentrazone+quinclorac, thiencarbazone+iodosulfuron+dicamba, triclopyr +clopyralid
Bahiagrass
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Preemergence: dithiopyr, indaziflam, isoxaben, napropamide, pendamethalin, prodiamine+isoxaben
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Postemergence: bromoxynil, carfentrazone, 2,4-D+dicamba, dicamba, triclopyr, sulfentrazone, triclopyr +clopyralid
Seashore Paspalum
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Preemergence: dithiopyr, indaziflam, oxadiazon, pendamethalin, prodiamine+isoxaben
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Postemergence: carfentrazone, penoxsulam+sulfentrazone+dicamba+2,4-D, sulfentrazone, sulfentrazone+quinclorac
Zoysiagrass
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Preemergence: atrazine, dithiopyr, indaziflam, isoxaben, oxadiazon, pendamethalin, prodiamine+isoxaben
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Postemergence: atrazine, bromoxynil, carfentrazone, 2,4-D+dicamba, dicamba, imazaquin, metsulfuron, penoxsulam+sulfentrazone+dicamba+2,4-D, sulfentrazone, sulfentrazone+quinclorac, thiencarbazone+iodosulfuron+dicamba, triclopyr+clopyralid, trifloxysulfuron
Perennial Ryegrass
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Preemergence: oxadiazon
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Postemergence: bromoxynil, carfentrazone, 2,4-D+dicamba, dicamba, sulfentrazone, sulfentrazone+quinclorac, triclopyr +clopyralid
Refer to the publication Pest Control Guide for Turfgrass Managers at https://nwdistrict.ifas.ufl.edu/phag/files/2015/04/2012_UF_Pest_Control_Guide.pdf for brand names associated with chemical names listed.
