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Sequential Herbicide Treatments for Large Crabgrass (Digitaria sanguinalis) and Goosegrass (Eleusine indica) Control in Bermudagrass (Cynodon dactylon) Turf

Published online by Cambridge University Press:  12 June 2017

B. Jack Johnson
B. Jack Johnson*
Affiliation:
Crop and Soil Sci., Univ. Georgia, Georgia Agric. Exp. Stn., Griffin, GA 30223-1797. Contribution from the Georgia Agric. Exp. Stn. and by Hatch and state funds
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Abstract

Preemergence (PRE) and postemergence (POST) herbicides were sequentially applied to common bermudagrass over a two-year period to determine the lowest herbicide rates required to maintain acceptable large crabgrass and goosegrass control. Large crabgrass control was consistently higher in late August when MSMA at 2.2 kg ha−1 was applied to plots previously treated with dithiopyr at 0.3 kg ha−1 (99%) in 1991, and either pendimethalin at 1.1 kg ha−1 (95%) or oxadiazon at 1.1 kg ha−1 (94%) in 1992 than when either herbicide was applied alone (≤ 79%). Goosegrass control was also higher in late August when MSMA plus metribuzin at 2.0 + 0.14 kg ha−1 was applied to plots treated with pendimethalin at 1.7 kg ha−1 (71%) in 1991, with oxadiazon at ≤ 2.2 kg ha−1 (≤ 89%) in 1992, and with dithiopyr at 0.4 kg ha−1 (≤ 96%) both years than when the herbicides were applied alone. Diclofop at 1.1 kg ha−1 applied alone as POST controlled ≥ 96% goosegrass throughout the two-year period.

Keywords

Diclofop, (+)-2-[4-(2,4-dichlorophenoxy)phenoxy]propanoic aciddithiopyr, S,S-dimethyl 2-(difluoromethyl)-4-(2-methylpropyl)-6-(trifluoromethyl)-3,5-pyridinedicarbothioatemetribuzin, 4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-oneMSMA, monosodium salt of methylarsonic acidoxadiazon, 3-[2,4-dichloro-5-(1-methylethoxy)phenyl]-5-(1,1-dimethylethyl)-1,3,4-oxadiazol-2-(3H)-onependimethalin, N-(1-ethylpiopyl)-3,4-dimethyl-2,6-dinitrobenzenaminelarge crabgrass, Digitaria sanguinalis (L.) Scop. # DIGSAcommon bermudagrass, Cynodon dactylon (L.) Pers. # CYNDAgoosegrass, Eleusine indica (L.) Gaertn # ELEINTurfgrass injuryweed controlDIGSACYNDAELEIN
Type
Research
Information
Weed Technology , Volume 7 , Issue 3 , September 1993 , pp. 674 - 680
Copyright
Copyright © 1993 by the Weed Science Society of America 

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References

Literature Cited

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