Full TGIF Record # 76016
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Web URL(s):http://www.newss.org/proceedings/proceedings_2001_vol55.pdf#page=106
    Last checked: 07/24/2013
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Content Type:Abstract or Summary only
Author(s):Lycan, D. W.; Hart, S. E.; Murphy, J. A.
Author Affiliation:New Jersey Agricultural Experiment Station, Cook College, Rutgers University, New Brunswick, NJ
Title:Use of quinclorac for crabgrass control in newly seeded Kentucky bluegrass and creeping bentgrass
Section:Turfgrass and plant growth regulators
Other records with the "Turfgrass and plant growth regulators" Section
Meeting Info.:Boston Marriott Cambridge, Cambridge, MA: January 2, 3, 4, and 5, 2001
Source:Proceedings of the 55th Annual Meeting of the NortheasternWeed Science Society. Vol. 55, 2001, p. 106-107.
Publishing Information:Ithaca, NY: Northeastern Weed Science Society
# of Pages:2
Keywords:TIC Keywords: Quinclorac; Crabgrass control; Poa pratensis; Agrostis stolonifera; Digitaria sanguinalis; Postemergence weed control; Siduron; Application rates; Non-target effects
Abstract/Contents:"Field experiments were conducted in 2000 at the Rutgers Plant Science Research Center in Adelphia, NJ and at the Turfgrass Research Facility at Horticultural Farm II in North Brunswick, NJ to evaluate quinclorac for control of large crabgrass (Digitaria sanguinalis (L.) Scop.) in newly seeded Kentucky bluegrass (Poa pratensis L. 'Baron') and creeping bentgrass (Agrostis palustris Huds. 'L-93'), respectively. Soil type at Adelphia and North Brunswick was a Holmdel sandy-loam (OM=2%) and a Nixon loam (OM=3%), respectively. Kentucky bluegrass (KBG) was seeded on May 3 and creeping bentgrass was seeded on June 30. Herbicide treatments on KBG plots consisted of PRE applications of siduron at 3 and 6 lbs ai/A; PRE applications of quinclorac at 0.75 and 1.5 lbs ai/A; single early postemergence (EPOST) applications of quinclorac at 0.38, 0.57, and 1.5 lbs/A; and sequential postemergence applications of quinclorac at 0.38, 0.57, and 0.75 lbs/A. Single EPOST applications were made on June 5 when large crabgrass was at the 1 to 2 leaf stage. The second application of the sequential treatments was made on July 11 when crabgrass plants had 2 to 3 leaves of regrowth. Herbicide treatments on creeping bentgrass plots consisted of PRE applications of siduron at 3, 4.5, and 6 lbs/A; PRE applications of quinclorac at 0.38, 0.57, 0.75 and 1.5 lbs/A; and single EPOST applications of quinclorac at 0.38, 0.57, 0.75, and 1.5 lbs/A. EPOST applications were made on July 31 when crabgrass was at the 1 to 3 leaf stage. All postemergence applications of quinclorac in both studies included methylated seed oil (1% vol/vol) in the spray solution. PRE-applied quinclorac at 1.5 and 0.75 lbs/A reduced ground coverage of KBG by 76 and 39%, respectively, at 30 DAT. By 90 DAT, KBG had recovered from the lower rate of quinclorac; however, substantial thinning from the higher rate was still evident. Siduron at 6 lbs/A demonstrated only slight reductions in KBG coverage at 30 DAT. Single EPOST applications of quinclorac at 1.5 lbs/A reduced ground coverage of KBG by 13% at 30 DAT. Turfgrass thinning had not fully recovered from this higher rate by 60 DAT. All PRE applications of quinclorac and siduron probided at least 91% control of large crabgrass at 90 DAT. Single EPOST applications of quinclorac gave greater than 95% control of crabgrass at 30 DAT. Sequential postemergence applications of quinclorac at 0.38 and 0.57 lbs/A improved late summer crabgrass control as compared to single EPOST applications of these rates. PRE applications of quinclorac at 1.5, 0.75, and 0.38 lbs/A reduced ground coverage of creeping bentgrass by 92, 60, and 24%, respectively, at 30 DAT. Siduron did not reduce bentgrass coverage at 30 DAT. Single EPOST applications of quinclorac at 0.38 to 0.75 lbs/A resulted in 7 to 23% bentgrass chlorosis at 10 DAT. By 30 DAT, no chlorotic symptoms were visible. Control of large crabgrass from PRE-applied quinclorac at 0.38 lbs/A and siduron at 3 lbs/A fell below 80% by 60 DAT. All single EPOST applications of quinclorac provided at least 95% control of crabgrass at 30 DAT. These studies suggest that PRE-applied quinclorac has the potential to reduce ground coverage of newly emerging stands of Kentucky bluegrass and creeping bentgrass. In addition, Kentucky bluegrass injury from postemergence applications of quinclorac may be lessened without sacrificing large crabgrass control by applying sequential, lower rate applications instead of a single, higher rate application."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Lycan, D. W., S. E. Hart, and J. A. Murphy. 2001. Use of quinclorac for crabgrass control in newly seeded Kentucky bluegrass and creeping bentgrass. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 55:p. 106-107.
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Web URL(s):
http://www.newss.org/proceedings/proceedings_2001_vol55.pdf#page=106
    Last checked: 07/24/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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