Weed Control and Response to Herbicides during Tifton 85 Bermudagrass Establishment from Rhizomes
- Additional Document Info
- View All
Field studies were conducted in 2001 to 2003 to determine the effects of herbicides and application timings during establishment of 'Tifton 85' hybrid bermudagrass (Cynodon dactylon Pers. × C. nlemfuensis Vanderyst). The experimental design was a split plot with three replications. Main plot consisted of three herbicide application timings of 1, 14, and 28 d after planting (DAP), and subplots were 16 herbicide treatments. Hormone-like herbicides (picloram + 2,4-D amine and 2,4-D amine + dicamba) applied 1 DAP controlled large crabgrass [Digitaria sanguinalis (L.) Scop.] 70 to 82%, did not injure Tifton 85, and consistently aided in Tifton 85 establishment, resulting in 23 to 30% ground cover im 2001 and 2002 compared with 3 to 4% in the untreated control. Imazapic (0.02, 0.035, and 0.05 kg a.i. ha-1) applied 1 and 14 DAP injured Tifton 85, ranging from 4 to 48% injury across years, yet these plots consistently had greater ground cover compared with the control, ranging from 9 to 56%. Glyphosate (0.28 kg a.i. ha-1) applied 14 DAP injured Tifton 85 less than 9%, controlled large crabgrass 76%, broadleaf signalgrass (Urochloa platyphylla Munroe ex C. Wright) 91%, and had 38,45, and 17% ground cover in 2001, 2002, and 2003, respectively. Trifloxysulfuron (0.02 kg ha-1) applied 1 and 14 DAP controlled broadleaf signalgrass (>90%) and yellow nutsedge (Cyperus esculentus L.) (>90%), did not injure Tifton 85, and resulted in 41 to 67% ground cover in 2002 and 2003. These data illustrate that Tifton 85 establishment was improved when weeds were controlled. © American Society of Agronomy.
author list (cited authors)
Butler, T. J., Muir, J. P., & Ducar, J. T.