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Tolerance of ‘Salam’ Seashore Paspalum (Paspalum vaginatum) to Postemergence Herbicides

Published online by Cambridge University Press:  20 January 2017

J. Bryan Unruh
Affiliation:
West Florida Research and Education Center, Environmental Horticulture Department, Agronomy Department, University of Florida, 5988 Highway 90, Building 4900, Milton, FL 32583
Daniel O. Stephenson IV*
Affiliation:
West Florida Research and Education Center, Environmental Horticulture Department, Agronomy Department, University of Florida, 5988 Highway 90, Building 4900, Milton, FL 32583
Barry J. Brecke
Affiliation:
West Florida Research and Education Center, Environmental Horticulture Department, Agronomy Department, University of Florida, 5988 Highway 90, Building 4900, Milton, FL 32583
Laurie E. Trenholm
Affiliation:
Environmental Horticulture Department, Institute of Food and Agricultural Science, University of Florida, P.O. Box 110675, Gainesville, FL 32611-0670
*
Corresponding author's E-mail: [email protected]

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.

Type
Research Article
Copyright
Copyright © Weed Science Society of America 

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