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Response of Tall Fescue (Festuca arundinacea) to Plant Growth Regulators and Mowing Frequency

Published online by Cambridge University Press:  12 June 2017

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

Mefluidide, Mon 4620, paclobutrazol plus mefluidide, and flurprimidol plus mefluidide temporarily injured and discolored tall fescue without reducing shoot density. Mefluidide at 0.43 kg ai/ha and Mon 4620 at 2.8 kg ai/ha suppressed vegetative growth of mowed grass 4 weeks while unmowed grass was suppressed for 8 weeks. Mefluidide at 0.14 kg/ha with either flurprimidol at 1.1 kg ai/ha or paclobutrazol at 1.1 kg ai/ha suppressed vegetative growth of mowed tall fescue for 5 and 6 weeks, respectively. Combination treatments also suppressed the growth of nonmowed tall fescue 8 to 10 weeks. Mowing effectively suppressed seedheads for 12 weeks when the grass was mowed at 3 and 6 weeks, while mowing only once at 4 weeks did not. Seedhead suppression was not improved with weekly mowing compared with two mowings. Mowing influenced the performance of plant growth regulators on vegetative growth and seedhead control but not plant injury, quality, or shoot density.

Keywords

Flurprimidol, a-(1-methylethyl)-a-[4-(trifluoromethoxy)phenyl]-5-primidine methanolmefluidide, N-[2,4-dimethyl-5-[[(trifluoromethyl)sulfonyl] amino] phenyl] acetamideMon 4620, N-[(acetylamino)-methyl]-2-chloro-N-2,6(diethylphenyl)acetamidepaclobutrazol, (±)-(R*R*) β-[(4-chlorophenyl)methyl]-α-(1,1-dimethylethyl)-1H-1,2,4-triazole-1-ethanoltall fescue, Festuca arundinacea Schreb. ‘Ky 31’ #3 FESARSeedhead controlflurprimidolimazethapyrmefluidideMHMon-4620paclobutrazolsulfometuronFESAR
Type
Research
Information
Weed Technology , Volume 3 , Issue 1 , March 1989 , pp. 54 - 59
Copyright
Copyright © 1989 by the Weed Science Society of America 

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References

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