Full TGIF Record # 162738
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Web URL(s):http://www.newss.org/proceedings/proceedings_2010.pdf#page=83
    Last checked: 07/22/2013
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Report
Content Type:Abstract or Summary only
Author(s):Naedel, M. B.; Borger, J. A.; Hivner, K. R.; Loughner, D. L.
Author Affiliation:Penn State, University Park, PA
Title:Multiple applications for preemergence smooth crabgrass control
Meeting Info.:Cambridge, MA: January 4-7, 2010
Source:Proceedings: 64th Annual Meeting of the NortheasternWeed Science Society. Vol. 64, 2010, p. 67.
Publishing Information:Ithaca, NY: Northeastern Weed Science Society
# of Pages:1
Keywords:TIC Keywords: Application rates; Application timing; Crabgrass control; Digitaria ischaemum; Herbicide efficacy; Herbicide evaluation; Lolium perenne; Preemergence weed control
Cultivar Names:Jet Elite
Abstract/Contents:"Preemergence control of smooth crabgrass (Digitaria ischaemum) was evaluated on a mature stand of 'Jet Elite' perennial ryegrass (Lolium perenne L.) in three consecutive years at the Valentine Turfgrass Research Center, Penn State University, University Park, PA. The objective of the studies were to determine the efficacy of selected preemergence herbicides for the control of smooth crabgrass when applied two or three times at reduced rates compared to industry standard rates and application timings. The studies were randomized complete block designs, each with three replications. Treatments in the 2007 trial were applied on March 27, April 26, and June 7, 2007 and treatments in the 2008 trial were applied on March 27, April 24, and June 17, 2008 and treatments in the 2009 trial were applied on March 26, April 20, and May 31, 2009. All treatments were applied using a three foot CO2 powered boom sprayer calibrated to deliver 80 gpa using one, flat fan, 11008E nozzle at 40 psi. After the second and third application of both studies, the test areas received approximately 0.5 inch of water. In early May of both years, 0.5 lb N/M from a 46-0-0 urea and 0.5 lb N/M from a 31-0-0 IBDU fertilizer was applied to the test areas. The sites were mowed once per week with a rotary mower at one inch with clippings returned. The test areas were overseeded with a native source of smooth crabgrass seed in the fall of at least two of the previous growing seasons. The test sites consistently revealed approximately 90% cover of smooth crabgrass in the non-treated areas at the conclusion of each study. Smooth crabgrass germination was first noted in the non-treated areas of the test site on May 1, 2007, April 29, 2008, and April 28, 2009. Rates of Dimension were compared by total amount of active ingredient applied per growing season. On the August 15, 2008 rating for the first study, Dimension 2EW applied at 0.25 lb ai/A once in March had significantly less control of smooth crabgrass than Dimension 2EW applied at 0.125 lb ai/A twice in March and April and Dimension 2EW applied at 0.083 lb ai/A three times in March, April, and June. Dimension 2EW applied at 0.38 lb ai/A once in March and Dimension 2ED applied twice at 0.18lb ai/A had significantly less crabgrass control than Dimension 2EW applied three times at 0.125 lb ai/A. Dimension 2EW applied three times at 0.167 lb ai/A revealed significantly greater control of smooth crabgrass than Dimension 2EW applied twice at 0.25 lb ai/A or once at 0.5 lb ai/A. On the August 6, 2007 rating date for the second study, Dimension 40WP applied three times at 0.2, 0.1, and 0.2 lb ai/A and Dimension 40WP applied three times at 0.125 lb ai/A revealed significantly greater crabgrass control than Dimension 40WP applied once at 0.5 lb ai/A On August 20, 2009, the rating date of the third study, 2 or three applications of Dimension 2EW at the same rate of a single application at 0.5 or 0.38 lb ai/A did not significantly differ. All of these treatments revealed greater than a 92% reduction of the crabgrass population."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Naedel, M. B., J. A. Borger, K. R. Hivner, and D. L. Loughner. 2010. Multiple applications for preemergence smooth crabgrass control. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 64:p. 67.
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Web URL(s):
http://www.newss.org/proceedings/proceedings_2010.pdf#page=83
    Last checked: 07/22/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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