Full TGIF Record # 56476
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Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):Smith, K. L.; Mislevy, P.; Bryson, C. T.
Author Affiliation:BASF Corporation, Overton, TX, University of Florida, Ona, and USDA ARS, Southern Weed Sci. Research Unit, Stoneville, MS.
Title:Influence of herbicides on vegetative establishment of bermudagrass (Cynodon dactylon)
Meeting Info.:51st Annual Meeting, Birmingham, AL, January 26-28, 1998
Source:Southern Weed Science Society Proceedings. Vol. 51, 1998, p. 75-76.
Publishing Information:Champaign, IL: Southern Weed Science Society.
# of Pages:2
Keywords:TIC Keywords: Hybrid bermudagrasses; Cynodon dactylon; Vegetative establishment; Herbicides; Weed control; 2,4-D; Dicamba; Norflurazon; Application timing; Application rates; Tank mix; Cyperaceae; Annual grasses; Broadleaf weeds; Annual weeds; Diodia teres; Mollugo verticillata; Cyperus esculentus; Digitaria sanguinalis; Herbicide injury
Abstract/Contents:"Hybrid bermudagrass (Cynodon dactylon) serves as the base forage for beef and dairy producers throughout the Southeastern United States. Propagation of the hybrid bermudagrasses is accomplished by transplanting sprigs (rhizomes and crown buds) or vegetative stems from existing stands into prepared seedbeds. If left uncontrolled, competition from germinating annual grasses, broadleaf weeds and sedges compete heavily with the newly sprigged bermudagrass preventing or severely delaying stand establishment. Previously used atrazine and simazine herbicides have been removed from this market leaving producers with few options to control weeds in newly sprigged bermudagrass. Field studies were conducted at the University of Florida Range Cattle Research Center, Ona, Florida in 1996, Stephenville and Overton, Texas in 1997 to evaluate the effectiveness of 2,4-D, dicamba and norflurazon for weed control during establishment of Tifton 85 and coastal bermudagrass. The Florida study was designed in a split block design with fertilizer timing being the whole plots and herbicide treatment being the subplots. No interaction was detected between time of fertilization and herbicide treatment; therfore, data were pooled across fertilizer treatments for each herbicide. The Texas studies were designed in a randomized block design. All herbicides were sprayed broadcast. In the Florida study, Weedmaster (1.0 lb ai/dicamba and 2.89 lb ai/2,4-D per gallon) was applied at 0.5, 1.0, and 2.0 lb ai/A 7 and 28 days after planting (DAP); Zorial (norflurazon) was applied at planting at 0.5 and 1.0 lb ai/A. A tankmix of 0.5 lb ai/A Zorial and 1.0 lb ai/A Weedmaster was applied 7 and 28 DAP. All herbicide treatments increased precent ground cover of bermudagrass over the untreated check 70 days after planting. Herbicide applications at 7 DAP resulted in a higher bermudagrasss [bermudagrass] ground cover than did the 28 DAP. There was no response in ground cover to herbicide rates. All herbicide treatments improved annual sedge control over the untreated check plot. Weedmaster at 2.0 lb ai/A 7 DAP, 1 lb ai/A 7 and 28 DAP and Zorial + Weedmaster at 0.5 + 1.0 lb ai/A 7 DAP gave superior control of annual sedges to the the Zorial + Weedmaster at 0.5 + 1/0 lb ai/A 28 DAP. There were no differences among other herbicide treatments. Only the Zorial + Weedmaster at 0.5 + 1.0 lb ai/A 7 DAP treatment was superior to the untreated check for control of annual grasses. Increased annual broadleaf weed control was noted with all herbicide treatments over the untreated check. Treatments containing Weedmaster tended to offer more control of broadleaf weeds than those without Weedmaster. In the Texas trials, Weedmaster (0.5, 1.0, 1.5, and 2.0 lb ai/A), 2,4-D (1.0 lb ai/A), Zorial (0.5 lb ai/A) and Banvel (dicamba) (0.5 lb ai/A) were applied at weed germination. This was 6 DAP at the Stephenville site, and 19 DAP at the droughty Overton site. Weed germination at the Overton site was delayed due to drought conditions after sprigging the bermudagrass. Evaluations included control ratings of poorjoe (Diodia teres) and carpetweed (Mollugo verticillata) in Stephenville; woolly croton (Croton capitatus) and yellow nutsedge (Cyperus esculentus) in Overton; and crop injury and crabgrass (Digitaria sanguinalis) control in both locations. Zorial was the only treatment that resulted in crop injury greater than the untreated check. The injury was in the form of bleaching in early evaluations and had disappeared by 60 DAT. Poorjoe and carpetweed control was less with Zorial than all other herbicide treatments and was not differnt from the untreated check by 60 DAT. Woolly croton control with Zorial was also greater than the untreated check, but much less than with Weedmaster, 2,4-D and Banvel. Yellow nutsedge control was best with Weedmaster at 1.0, 1.5, and 2.0, Zorial at 0.5 and Banvel at 0.5 lb ai/A. Weedmaster at 0.5 provided greater control than 2,4-D at 1.0 and all treatments were superior to the untreated check. Data from studies conclude that a broad spectrum of germinating annual weeds can be controlled in newly sprigged bermudagrass areas. Zorial provided slightly superior control of annual grasses, but provided little control of broadleaf weeds. Weedmaster and Banvel provided acceptable control of crabgrass and yellow nutsedge and excellent control of broadleaf weeds. 2, 4-D provided acceptable control of crabgrass and and broadleaf weeds but was less effective than Weedmaster, Banvel or Zorial for control of sedges. Herbicides were most effective when applied at or near germination of weeds."
Language:English
References:0
See Also:Other items relating to: 2, 4 - D in Turf
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Smith, K. L., P. Mislevy, and C. T. Bryson. 1998. Influence of herbicides on vegetative establishment of bermudagrass (Cynodon dactylon). South. Weed Sci. Soc. Proc. 51:p. 75-76.
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