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Response of Bahiagrass (Paspalum notatum) to Plant Growth Regulators

Published online by Cambridge University Press:  12 June 2017

B. Jack Johnson
B. Jack Johnson*
Affiliation:
Univ. Georgia, Georgia Stn., Griffin, GA 30223-1797
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Abstract

Imazethapyr, glyphosate-isopropylamine salt, and glyphosate-sodium sesqui salt plus 2,4-D injured bahiagrass severely for 4 to 6 wk after treatment (WAT) but effectively controlled seedheads for 10 WAT without permanently reducing turf density. Imazethapyr applied twice at 0.08 kg ha-1 suppressed vegetative growth of mowed bahiagrass by 5 WAT while unmowed turf was suppressed 62% by 6 WAT. Glyphosate-isopropylamine salt suppressed vegetative growth by 3 WAT, but did not consistently suppress unmowed bahiagrass. Bahiagrass treated with glyphosate-sodium sesqui salt injured bahiagrass more than glyphosate-isopropylamine salt when each was applied at the same rate. CGA 163935 suppressed bahiagrass seedheads for 8 WAT and vegetative growth from 2 to 4 WAT. The activity of mefluidide, MON 4620 plus paclobutrazol, paclobutrazol plus mefluidide, and flurprimidol plus mefluidide was minimal on bahiagrass.

Keywords

CGA 163935, 4-(cyclopropyl)-α-hydroxy-methylene)-3,5-dioxo-cyclohexanecarboxylic-acid ethylesterflurprimidol, α-(1-methylethyl)-α-[4-trifluoromethoxy)phenyl-5-pyrimidinemethanolglyphosate-IA, isopropylamine salt of N-(phosphonomethyl)glycineglyphosate-SS, sodium sesqui salt of N-(phosphonomethyl)-glycineimazethapyr, (±)-2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-3-pyridinecarboxylic acidmefluidide, N-[2,4-dimethyl-5-[[(trifluoromethyl)sulfonyl]amino]phenyl]acetamideMON 4620, N-[(acetylamino)-methyl]-2-chloro-N-2,5-(diethylphenyl)acetamidepaclobutrazol, (±)-(R*R*) β-[(4-chlorophenyl)methyl]-α-(1,1-dimethylethyl)-1H-1,2,4-triazole-1-ethanol2,4-D, (2,4-dichlorophenoxy)acetic acidbahiagrass, Paspalum notatum Fluegge ‘Wilmington’ ♯3 PASNOSeedhead controlturf injuryturf densityvegetative suppressionglyphosateimazethapyrCGA 163935PASNO
Type
Research
Information
Weed Technology , Volume 4 , Issue 4 , December 1990 , pp. 895 - 899
Copyright
Copyright © 1990 Weed Science Society of America 

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References

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