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Preemergence and Postemergence Herbicides for Large Crabgrass (Digitaria sanguinalis) Control in Centipedegrass (Eremochloa ophiuroides)

Published online by Cambridge University Press:  12 June 2017

B. Jack Johnson
B. Jack Johnson*
Affiliation:
University of Georgia, Georgia Agricultural Experimental Station, Griffin, GA 30223-1797
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Abstract

Two experiments were conducted over a two-year period for large crabgrass control in centipedegrass. The experiments were: (a) sequential applications of PRE and POST herbicides, and (b) POST herbicides applied as sequential or tank-mixed applications. Large crabgrass control was greater than 80% throughout the spring and summer when dithiopyr was applied PRE at 0.14 kg/ha late in February or when tank mixed at the same rate with sethoxydim at 0.11 kg/ha and applied POST in late May. Control was similar from a sequential program of dithiopyr applied PRE at 0.14 kg/ha in February and followed either by dithiopyr at 0.14 kg/ha or sethoxydim at 0.11 kg/ha as POST in early to mid-summer. Dithiopyr at 0.28 kg/ha as a POST application in late May did not control large crabgrass consistently. Control was > 80% for 6 to 8 wk when the POST dithiopyr treatment was repeated at the same rate 1 mo later. Sethoxydim applied POST controlled large crabgrass greater than 80% throughout the spring and summer when applied once at 0.22 kg/ha or twice at 0.11 kg/ha in each of two applications. Dithiopyr applied alone or with sethoxydim as sequential or tank-mixed treatments caused slight to moderate centipedegrass injury but was commercially acceptable (< 30%). However, injury from tank-mix herbicides was similar to either applied alone. Quinclorac severely injured (> 30%) centipedegrass, and 8 to 10 wk were required for recovery.

Keywords

Dithiopyr, S,S-dimethyl 2-(difluoromethyl)-4-(2-methylpropyl)-6-(trifluoromethyl)-3,5-pyridinedicarbothioatequinclorac, 3,7-dichloro-8-quinolinecarboxylic acidsethoxydim, 2-[1-(ethoxyimino)butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-onecentipedegrass, Eremochloa ophiuroides (Munro) Hack. # ERLOP, large crabgrass, Digitaria sanguinalis (L.) ScopHerbicide programturfgrass injuryweed controlDIGSAERLOPMSMA, monosodium salt of methylarsonic acidWAT, weeks after treatment
Type
Research
Information
Weed Technology , Volume 11 , Issue 1 , March 1997 , pp. 144 - 148
Copyright
Copyright © 1997 by the Weed Science Society of America 

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References

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