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Response of Bermudagrass (Cynodon spp.) to Plant Growth Regulators

Published online by Cambridge University Press:  12 June 2017

Billy J. Johnson
Billy J. Johnson*
Affiliation:
Univ. Ga., Ga. Stn., Griffin, GA 30223-1797
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Abstract

Plant growth regulators were evaluated on African ‘Tifway’ and common bermudagrass. The vegetative growth of mowed Tifway bermudagrass was suppressed 15 to 22% for 3 weeks by flurprimidol at 0.84 kg ai/ha while mowed common bermudagrass was suppressed 30 to 34% during the same period by flurprimidol at 1.1 kg/ha. When nonmowed bermudagrass was treated with flurprimidol, the growth of Tifway treated at 0.84 kg/ha was suppressed 42% at 8 weeks while growth of common bermudagrass treated at 1.1 kg/ha was suppressed 26% at 6 weeks. Excessive injury by flurprimidol occurred when common and Tifway bermudagrass were treated at rates above 1.1 and 0.84 kg/ha, respectively. Imazethapyr excessively injured both bermudagrass cultivars. Mefluidide and Mon 4620 injured both bermudagrass cultivars slightly, but neither suppressed vegetative growth as effectively as flurprimidol.

Keywords

Flurprimidol, α-(1-methyl-ethyl)-α-[4-trifluoromethoxy)phenyl]-5-pyrimidinemethanolimazethapyr, (±)-2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-ethyl-3-pyridinecarboxylic acidmefluidide, N-[2,4-dimethyl-5-[[(trifluoromethyl)sulfonyl]amino]phenyl]acetamideMon 4620, N-[(acetylamino)methyl]-2-chloro-N-2,6-(diethylphenyl)acetamideAfrican ‘Tifway’ bermudagrass, Cynodon transvaalensis Burtt-Davey ♯3 CYNTRx C. dactylon (L.)Pers. ♯ CYNDATurf qualityflurprimidolimazethapyrmefluidideMon 4620CYNDACYNTR
Type
Research
Information
Weed Technology , Volume 3 , Issue 3 , September 1989 , pp. 440 - 444
Copyright
Copyright © 1989 by the Weed Science Society of America 

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References

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