Virginia Buttonweed Biology and Management in Turf1
Virginia buttonweed (Diodia virginiana) is a spreading perennial herb with hairy, branched stems. Leaves are opposite, elliptic to lance shaped, sessile, and joined across the stems by a membrane. The membrane has a few "hair-like" projections. Flowers are white and tubular with four lobes at each axil along the stem. The flower usually only has two sepals. Fruit form at each axil and are green, elliptically shaped, hairy, and ridged. Reproduction occurs via seed, roots, and stem fragments. Virginia buttonweed favors moist to wet sites and is found from New Jersey west to Missouri and south into the Gulf Coast states.
Herbicide Options for Controlling Virginia Buttonweed in Florida Turfgrass
(Always refer to the label for specific uses, application rates, and turfgrass tolerance)
Bermudagrass
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Preemergence: none
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Postemergence: carfentrazone +2,4-D, clopyralid, 2,4-D+dicamba, dicamba, fluroxypyr, penoxsulam+sulfentrazone+dicamba+2,4-D, thiencarbazone+iodosulfuron+dicamba, thiencarbazone+floramsulfuron+halosulfuron, trifloxysulfuron
St. Augustinegrass
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Preemergence: none
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Postemergence: carfentrazone, 2,4-D+dicamba (follow label recommendations to minimize turf injury), dicamba, penoxsulam+sulfentrazone+dicamba+2,4-D, thiencarbazone+iodosulfuron+dicamba
Centipedegrass
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Preemergence: none
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Postemergence: carfentrazone+2,4-D, clopyralid, 2,4-D+dicamba, dicamba, fluroxypyr, penoxsulam+sulfentrazone+dicamba+2,4-D, thiencarbazone+iodosulfuron+dicamba, triclopyr+clopyralid
Bahiagrass
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Preemergence: none
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Postemergence: carfentrazone, clopyralid, 2,4-D+dicamba, dicamba, fluroxypyr, triclopyr+clopyralid
Seashore Paspalum
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Preemergence: none
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Postemergence: carfentrazone
Zoysiagrass
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Preemergence: none
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Postemergence: carfentrazone+2,4-D, clopyralid, 2,4-D+dicamba, dicamba, fluroxypyr, penoxsulam+sulfentrazone+dicamba+2,4-D, thiencarbazone+iodosulfuron+dicamba, triclopyr+clopyralid, trifloxysulfuron
Perennial Ryegrass
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Preemergence: none
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Postemergence: carfentrazone, clopyralid,2, 4-D+dicamba, dicamba, fluroxypyr, 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.