Response of centipedegrass to plant growth regulator and iron treatment combinations
1990
Carrow, R.N. | Johnson, B.J.
Centipedegrass [Eremochola ophiuroides (Munro) Hack.], a widely used low maintenance turfgrass in the Southeast, requires only infrequent mowing except during seedhead production periods. Recently, plant growth regulators (PGRs) have been identified that suppress seedhead development and reduce mowing, but they may cause turfgrass injury expressed as loss of green color or leaf tip reddening. Foliar iron (Fe) was applied at 0, 0.73, and 1.46 kg/ha (0, 0.65, 1.30 lb Fe/A) in combination with mefluidide, imazethapyr, and flurprimidol plus mefluidide at 0.56, 0.30, 1.70 + 0.28 kg ai/ha, respectively, to investigate the potential for Fe to reduce PGR injury. When mefluidide and flurprimidol plus mefluidide reduced the degree of green color on centipedegrass, foliar Fe applied with these PGRs eliminated the color loss. Injury from imazethapyr was expressed as leaf tip reddening, and foliar Fe did not influence this type of injury. Iron applied with PGRs did not alter the vegetative retardation or seedhead suppression abilities of the PGRs. Imazethapyr was most effective in suppressing seedhead development.
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