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Publication #ENH1233

Black Medic Biology and Management in Turf1

Barry J. Brecke, Ramon Leon, J. Bryan Unruh, and Darcy E. P. Telenko2

Black medic (Medicago lupulina) is a dark green annual with spreading, prostrate growth. Leaves are alternate with three leaflets on square stems. Leaflets are obovate to elliptic, toothed near the tip, and have a small spur on the tip. Bright yellow flowers are produced in tight, compressed clusters at leaf axils. Reproduction occurs via seed in tightly coiled black seed pods.

Figure 1. 

Black medic


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Creative Commons BY-NC by hedgerowmobile


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Herbicide options for controlling black medic in Florida turfgrass

(Always refer to the label for specific uses, application rates, and turfgrass tolerance.)

Refer to the publication Pest Control Guide for Turfgrass Managers at turf.ufl.edu/pdf/2012_UF_Pest_Control_Guide.pdf for brand names associated with chemical names listed.

Bermudagrass

  • Preemergence: none

  • Postemergence: carfentrazone, clopyralid, 2,4-D, dicamba, quinclorac, sulfentrazone, sulfentrazone+imazethapyr, sulfentrazone+quinclorac, sulfentrazone+2,4-D+MCPP+dicamba, thiencarbazone+iodosulfuron+dicamba, triclopyr+clopyralid, trifloxysulfuron

St. Augustinegrass

  • Preemergence: none

  • Postemergence: carfentrazone, clopyralid, 2,4-D, dicamba, sulfentrazone, thiencarbazone+iodosulfuron+dicamba

Centipedegrass

  • Preemergence: none

  • Postemergence: carfentrazone, 2,4-D, dicamba, sulfentrazone, sulfentrazone+imazethapyr, sulfentrazone+quinclorac, sulfentrazone+2,4-D+MCCP+dicamba, thiencarbazone+iodosulfuron+dicamba

Bahiagrass

  • Preemergence: none

  • Postemergence: carfentrazone, 2,4-D, dicamba, sulfentrazone, sulfentrazone+2,4-D+MCCP+dicamba, triclopyr+clopyralid

Seashore paspalum

  • Preemergence: none

  • Postemergence: carfentrazone, quinclorac, sulfentrazone, sulfentrazone+quinclorac

Zoysiagrass

  • Preemergence: none

  • Postemergence: carfentrazone, 2,4-D, dicamba, quinclorac, sulfentrazone, sulfentrazone+imazethapyr, sulfentrazone+quinclorac, sulfentrazone+2,4-D+MCCP+dicamba, thiencarbazone+iodosulfuron+dicamba, triclopyr+clopyralid, trifloxysulfuron

Perennial ryegrass

  • Preemergence: none

  • Postemergence: carfentrazone, 2,4-D, dicamba, quinclorac, sulfentrazone, sulfentrazone+quinclorac, triclopyr+clopyralid

Footnotes

1.

This document is ENH1233, one of a series of the Environmental Horticulture Department, UF/IFAS Extension, Gainesville 32611. Original publication date December 2013. 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.

2.

Barry J. Brecke, professor, and Ramon Leon, assistant professor, Agronomy Department; J. Bryan Unruh, professor, Environmental Horticulture Department; Darcy E. P. Telenko, postdoctoral research associate; West Florida Research and Education Center, UF/IFAS Extension, Gainesville, 32611.


The Institute of Food and Agricultural Sciences (IFAS) is an Equal Opportunity Institution authorized to provide research, educational information and other services only to individuals and institutions that function with non-discrimination with respect to race, creed, color, religion, age, disability, sex, sexual orientation, marital status, national origin, political opinions or affiliations. For more information on obtaining other UF/IFAS Extension publications, contact your county's UF/IFAS Extension office.

U.S. Department of Agriculture, UF/IFAS Extension Service, University of Florida, IFAS, Florida A & M University Cooperative Extension Program, and Boards of County Commissioners Cooperating. Nick T. Place, dean for UF/IFAS Extension.