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Carpetgrass Response to Postemergence Herbicides

Published online by Cambridge University Press:  12 June 2017

Lambert B. McCarty  and
Daniel L. Colvin
Lambert B. McCarty
Affiliation:
Environ. Hortic., 1523 Fifield Hall, Univ. Fla., Gainesville, FL 32611-0512
Daniel L. Colvin
Affiliation:
Agron., Univ. Ha., Gainesville, FL 32611-0311
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Abstract

Carpetgrass is a warm season grass used in the south as low maintenance turf, especially in wet areas where other turf species do not persist. The response of carpetgrass to postemergence (POST) herbicides currently available for turf producers has not been thoroughly investigated and was the objective of four experiments conducted over a 2-yr period. Slight reduction in turf quality followed application of atrazine (2.2 kg ai ha-1), bentazon (2.2 kg ai ha-1), imazaquin (0.4 and 0.6 kg ai ha-1), mecoprop (1.1 kg ai ha-1), triclopyr (0.6 kg ai ha-1), metsulfuron (0.2 kg ai ha-1), 2,4-D (1.1 kg ai ha-1), 2,4-D plus dicamba (0.8 + 0.3 kg ai ha-1), and 2,4-D plus dicamba plus mecoprop (0.9 + 0.1 + 0.5 kg ai ha-1). Marginally acceptable turf quality followed sulfometuron (0.2 kg ai ha-1), sethoxydim (0.3 and 0.6 kg ai ha-1), and diclofop (2.2 kg ai ha-1) treatments. Unacceptable turf quality resulted from asulam (2.2 kg ai ha-1) and MSMA (1.1 and 2.2 kg ai ha-1) treatments. Carpetgrass tolerated most POST broadleaf and sedge herbicides but was sensitive to most POST grass herbicides used in other turf species, with the exception of sethoxydim.

Keywords

Asulam, methyl [(4-aminophenyl)sulfonyl] carbamate2,4-D, (2,4-dichlorophenoxy)acetic aciddicamba, 3,6-dichloro-2-methoxybenzoic aciddiclofop, (±)-2-[4-(2,4-dichlorophenoxy)phenoxy]propanoic acidmecoprop, (±)-2-(4-chloro-2-methylphenoxy)propanoic acidMSMA, monosodium salt of methylarsonic acidtriclopyr, [(3,5,6-trichloro-2-pyridinyl)oxy]acetic acidcarpetgrass Axonopus affinis ChaseLawnsturfgrassasulamatrazinebentazon2,4-DdicambadiclofopimazaquinmecopropMSMAmetsulfuronsethoxydimsulfometurontriclopyrAxonopus affinis Chase
Type
Research
Information
Weed Technology , Volume 5 , Issue 3 , September 1991 , pp. 563 - 565
Copyright
Copyright © 1991 Weed Science Society of America 

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References

Literature Cited

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