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1 July 2006 Tolerance of ‘Salam’ Seashore Paspalum (Paspalum vaginatum) to Postemergence Herbicides
J. BRYAN UNRUH, DANIEL O. STEPHENSON, BARRY J. BRECKE, LAURIE E. TRENHOLM
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Abstract

Field studies were conducted to assess the tolerance of seashore paspalum (‘Salam’) to postemergence (POST) herbicides in Florida in 2000 and 2001. POST applications of bentazon (2,200 g/ha), clopyralid (420 g/ha), dicamba (280 g/ha), halosulfuron (70 g/ha), imazaquin (420 g/ha), mecoprop 2,4-D dicamba (160 180 40 g/ha), metsulfuron (30 g/ha), and quinclorac (1,700 g/ha) resulted in ≤10% injury 7 and 15 d after treatment (DAT), indicating their safety for POST application. Clethodim (280 g/ha) and sethoxydim (310 g/ha) caused 67 and 46% injury, respectively, 15 DAT averaged across 2000 and 2001. Ethofumesate was inconsistent between years, causing 30 and 60% injury 7 and 15 DAT, respectively, in 2000, but only 5 and 13% 7 and 15 DAT, respectively, in 2001. Imazapic and trifloxysulfuron-sodium caused an average of 47% injury 7 DAT in 2000 and 45% injury 15 DAT in 2001. Clethodim, ethofumesate, imazapic, sethoxydim, and trifloxysulfuron-sodium can not be safely applied POST to Salam seashore paspalum; however, bentazon, clopyralid, dicamba, halosulfuron, imazaquin, mecoprop 2,4-D dicamba, metsulfuron, and quinclorac are safe.

Nomenclature: Bentazon, clethodim, clopyralid, dicamba, ethofumesate, halosulfuron, imazapic, imazaquin, mecoprop 2,4-D dicamba, metsulfuron, quinclorac, sethoxydim, trifloxysulfuron-sodium; seashore paspalum, Paspalum vaginatum Swartz ‘Salam’ #3 PASVA.

Additional index words: Turfgrass tolerance, turfgrass injury.

Abbreviations: DAT, days after treatment; OCGC, Old Collier Golf Club; WFREC, West Florida Research and Education Center.

J. BRYAN UNRUH, DANIEL O. STEPHENSON, BARRY J. BRECKE, and LAURIE E. TRENHOLM "Tolerance of ‘Salam’ Seashore Paspalum (Paspalum vaginatum) to Postemergence Herbicides," Weed Technology 20(3), 612-616, (1 July 2006). https://doi.org/10.1614/WT-05-021R1.1
Published: 1 July 2006
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