Full TGIF Record # 86459
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Web URL(s):http://www.newss.org/proceedings/proceedings_2003_vol57.pdf#page=97
    Last checked: 07/23/2013
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Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):Beam, J. B.; Askew, S. D.; Barker, W. L.; Jennings, K. M.
Author Affiliation:Beam, Askew and Barker: Virginia Tech, Blacksburg, Virginia; and Jennings: BASF Corporation, RTP, North Carolina
Title:Prohexadioine [Prohexadione] calcium for turfgrass growth regulation and annual bluegrass control
Section:Turfgrass and plant growth regulators
Other records with the "Turfgrass and plant growth regulators" Section
Meeting Info.:Hyatt Regency Hotel, Baltimore, MD: January 6-9, 2003
Source:Proceedings of the 57th Annual Meeting of the NortheasternWeed Science Society. Vol. 57, 2003, p. 97.
Publishing Information:Ithaca, NY: Northeastern Weed Science Society
# of Pages:1
Keywords:TIC Keywords: Growth regulator evaluation; Growth regulators; Poa annua control; Prohexadione-calcium
Abstract/Contents:"Prohexadione calcium is a gibberellin inhibitor like paclobutrazol and trinexapac-ethyl. Trinexapac-ethyl and paclobutrazol reduce clipping biomass and mowing requirements in most species of turfgrass. Paclobutrazol also controls annual bluegrass (Poa annua L.). Prohexadione calcium was tested for turfgrass growth management and annual bluegrass control in Virginia. In the growth management experiment, plots were mowed weekly for 10 wk and clipping biomass was assessed beginning in August of 2001 and 2002, and in June 2002. Species tested in the field were established stands of bermudagrass (Cynodon dactylon (L.) Pers. `Vamont'), Kentucky bluegrass (Poa pratensis L. `Midnight'), perennial ryegrass (Lolium perenne L. `Prosport'), and zoysiagrass (Zoysia japonica Steud. `Korean common' and `Meyer') and in the greenhouse perennial ryegrass, fine fescue (Festuca rubra var. commutata `Chewings') and Kentucky bluegrass `Viva'. One day after the second mowing, prohexadione calcium was applied at 0, 0.14, 0.27, 0.41, 0.54, and 0.68 kg ai/ha with a nonionic surfactant (NIS) at 0.25% (v/v). Trinexapac-ethyl was applied twice at the label rate for each species on a 4 wk interval as a comparison treatment. A second prohexadione calcium treatment was applied 3 wk after the first. In field and greenhouse experiments, prohexadione calcium reduced clipping weights compared to the nontreated control. When averaged over 2 greenhouse trials and based on regression equations, prohexadione calcium reduced turfgrass clipping biomass equal to the label rate of trinexapac-ethyl when applied at 0.4 kg ai/ha in fine fescue, 0.2 kg ai/ha in Kentucky bluegrass, and 0.7 kg ai/ha in perennial ryegrass. When averaged over 3 field trials, prohexadione calcium reduced turfgrass clipping biomass equivalent to label rates of trinexapac-ethyl when applied at 0.2 kg ai/ha in Kentucky bluegrass, 0.7 kg ai/ha in perennial ryegrass, 0.7 kg ai/ha in bermudagrass, and 0.3 kg ai/ha in zoysiagrass. In annual bluegrass control experiments, prohexadione calcium was applied at the same rates and timings as in the growth management experiments at the Virginia Tech Golf Course (VTGC) in Blacksburg, VA, Chantilly Turf Farms in Chantilly, VA, and Stony Creek Golf Course in Wintergreen, VA. At the VTGC a third treatment of prohexadione calcium was made 3 wk after the second and ethofumesate was included (1.5 kg ai/ha, applied twice) as a comparison. At Wintergreen and Chantilly, paclobutrazol (0.56 kg ai/ha, applied twice) was the comparison. Adjuvant tests were also included at all locations, crop oil concentrate (COC) at 1% v/v and methylated seed oil (MSO) were tankmixed with prohexadione calcium at 0.41 kg ai/ha. At the VTGC, ethofumesate controlled annual bluegrass at least 90% starting at 8 WAT. Prohexadione calcium at 0.41 kg ai/ha + NIS controlled annual bluegrass at least 70% at all locations 12 WAT. Control was not altered with the addition of COC or MSO and was not different compared to paclobutrazol at any location. Prohexadione calcium injured turfgrass less than paclobutrazol and ethofumesate. Results indicate prohexadione calcium can be a viable option for chemical turf management and annual bluegrass control."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Beam, J. B., S. D. Askew, W. L. Barker, and K. M. Jennings. 2003. Prohexadioine [Prohexadione] calcium for turfgrass growth regulation and annual bluegrass control. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 57:p. 97.
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Web URL(s):
http://www.newss.org/proceedings/proceedings_2003_vol57.pdf#page=97
    Last checked: 07/23/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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MSU catalog number: SB 610 .N62 v. 57
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