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Mature Goosegrass (Eleusine indica) Control in Bermudagrass (Cynodon dactylon) Turf with a Metribuzin–Diclofop Combination

Published online by Cambridge University Press:  12 June 2017

Roy K. Nishimoto  and
Charles L. Murdoch
Roy K. Nishimoto*
Affiliation:
Department of Horticulture, University of Hawaii, Honolulu, HI 96822
Charles L. Murdoch
Affiliation:
Department of Horticulture, University of Hawaii, Honolulu, HI 96822
*
Corresponding author's E-mail: [email protected].
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Abstract

Field studies were conducted to determine if metribuzin–diclofop combinations could provide selective control of mature goosegrass in common bermudagrass turf. In two field trials, diclofop at 1.7 kg ai/ha provided 19% control of mature goosegrass at 7 wk after treatment (WAT), whereas metribuzin at 0.28 or 0.56 kg ai/ha controlled 30 and 53%, respectively. When diclofop at 1.7 kg/ha was combined with metribuzin at 0.28 or 0.56 kg/ha, goosegrass control increased to 68 and 90%, respectively. That degree of mature goosegrass control with a single application of metribuzin at 0.56 kg/ha plus diclofop at 1.7 kg/ha was equivalent to metribuzin at 0.56 kg/ha plus MSMA at 2.2 kg ae/ha followed by MSMA at 2.2 kg/ha 1 wk later. The metribuzin–diclofop combination injured common bermudagrass turf less than or equivalent to the metribuzin–MSMA combination. The injury was transitory; at 3 WAT, none of the treatments injured common bermudagrass.

Keywords

Diclofop, 2-[4-(2,4-dichlorophenoxy)phenoxy]propanoic acidmetribuzin, 4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-oneMSMA, monosodium salt of methylarsonic acidbermudagrass, Cynodon dactylon (L.) Pers # CYNDAgoosegrass, Eleusine indica (L.) Gaertn. # ELEINCYNDAELEINWAT, weeks after treatment
Type
Research
Information
Weed Technology , Volume 13 , Issue 1 , March 1999 , pp. 169 - 171
Copyright
Copyright © 1999 by the Weed Science Society of America 

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Footnotes

1

Journal series 4333 of the Hawaii Institute of Tropical Agriculture and Human Resources.

References

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