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Bermudagrass (Cynodon spp.) Cultivar Response to Diclofop, MSMA and Metribuzin

Published online by Cambridge University Press:  12 June 2017

Lambert B. McCarty ,
Landon C. Miller  and
Daniel L. Colvin
Lambert B. McCarty
Affiliation:
Environ. Hortic. Univ. Fla., Gainesville, FL 32611-0512
Landon C. Miller
Affiliation:
Hortic., Clemson Univ., Clemson, SC 29634-0375
Daniel L. Colvin
Affiliation:
Agron., Univ. Fla., Gainesville, FL 32611-0311
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Abstract

Postemergence grass weed control in turf-type bermudagrass is currently available only with repeated applications of organic arsenicals and/or with combinations of metribuzin which decrease turf quality. Research was conducted to determine tolerance of the turf-type bermudagrass cultivars, Tifway, Ormond, and common, to diclofop rates ranging from 0.54 to 4.48 kg ai ha-1 with and without MSMA (2.2 kg ai ha-1) and metribuzin (0.2 kg ai ha-1). Bermudagrass cultivars tolerated diclofop well. When injury was evident, a rate response was noted, with higher rates (3.4 and 4.5 kg ha-1) resulting in increased phytotoxicity. However, this level of phytotoxicity was acceptable and the turf soon recovered (3 to 14 d). The addition of crop oil concentrate (1.25% v/v) did not affect turf quality. Addition of MSMA resulted in slightly lower turf quality than diclofop alone. However, these responses were acceptable and usually the turf recovered by 14 d after treatment. Metribuzin applied alone or in combination with diclofop damaged turf to unacceptable levels and up to 21 d were required for turf recovery.

Keywords

Diclofop (±)-2-[4-(2,4-dichlorophenoxy)phenoxy]propanoic acidMSMA, monosodium salt of methylarsonic acidmetribuzin, 4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-onebermudagrass, Cynodon dactylon (L.) Pers., Cynodon transvaalensis Burtt-Davey ‘Tifway’, ‘Ormond’Turf injuryphytotoxicityadditivesgolf courses
Type
Research
Information
Weed Technology , Volume 5 , Issue 1 , March 1991 , pp. 27 - 32
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

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