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| Web URL(s): | http://www.newss.org/proceedings/proceedings_2002_vol56.pdf#page=46
Last checked: 07/24/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Gover, A. E.;
Johnson, J. M.;
Kuhns, L. J. |
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| Author Affiliation: | Penn State University, University Park, PA |
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| Title: | Late season control of stiltgrass |
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| Meeting Info.: | Loews Hotel, Philadelphia, PA: January 7, 8, 9, and 10, 2002 |
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| Source: | Proceedings of the 56th Annual Meeting of the NortheasternWeed Science Society. Vol. 56, 2002, p. 46. |
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| Publishing Information: | Ithaca, NY: Northeastern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Microstegium vimineum; Weed control; Postemergence herbicides; Woodland landscapes
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| Abstract/Contents: | "Stiltgrass [Microstegium vimineum (Trin.)A. Camus] is an annual, shade tolerant, C4 grass becoming increasingly common in forest and wildland setting in the mid-Atlantic U.S. Though stiltgrass actually provides functional roadside groundcover, creating a haven for a species that can degrade adjacent properties is not desirable. As part of an ongoing project funded by the Pennsylvania Department of Transportation, a trial was initiated to compare the efficacy of non-selective and selective postemergence herbicides on stiltgrass. The trial location was communications cable ROW in a forested setting near Boalsburg, PA. Treatments included glyphosate at 0.42, 0.84, or 1.7 kg ae/ha; fluazifo-P-butyl at 0.28, 0.35, or 0.42 kg/ha; sethoxydim at 0.17, 0.35, or 0.52 kg/ha; clethodim at 0.09, 0.18, 0.27 kg/ha; and a single mowing. The herbicide treatments were applied September 18, 2001, to 1.8 by 6.1 m plots, arranged in a randomized complete block with three replications, with a CO2-powered, hand-held sprayer equipped with Spraying Systems XR8002VS tips, delivering 200 I/ha at 165 kPa. The stiltgrass existed in a uniform stand, 30 to 45 cm high, and seedheads were apparent. The mowed treatment was cut with a hand-held trimmer, low enough to remove all stiltgrass leaf tissue. On September 25, seven days after treatment (DAT), injury symptoms were readily apparent in all glyphosate and glufosinate-treated plots. No injury symptoms were visible in graminicide-treated plots, and no phenological differences were observed between these plots and the untreated check. On October 3, 15 DAT, the untreated plots were still green, with no apparent sign of decline. Injury in the glyphosate-treated plots was completely advanced, and all above-ground tissue was dessicated, and the inflorescences were straw colored with no indication of seed filling. Injury from glufosinate was rate dependent. Stiltgrass in the plots treated with 0.28, 0.56, or 1.1 kg/ha, was 50, 80, or 95 percent defoliated, respectively. However, even the most defoliated plants still had green culms. The graminicide-treated plots showed purple discoloration, with no rate or herbicide differences apparent. Characteristic necrotic lesions were visible above the last stem node when seedheads were pulled from the terminal sheath. On October 12, 24 DAT, the check plots were still green, all plants in glufosinate-treated plots were completely desiccated, and the inflorescences were straw colored and devoid of seed. The graminicide treated plots were 50 percent discolored with no visual differences between herbicides or rates. The mowed plots did not show regeneration. On November 8, all stiltgrass was completely dessicated. Filled, shattered seed was collected from untreated plots, but none of the seed collected from graminicide-treated plots appeared to be viable. Post-chilling germination tests will be used to confirm these observations. These results suggest that stiltgrass is susceptible to several types of postemergences herbicides with utility in wildland settings, and the functional application window for stiltgrass management extends to seedhead emergence." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Gover, A. E., J. M. Johnson, and L. J. Kuhns. 2002. Late season control of stiltgrass. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 56:p. 46. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_2002_vol56.pdf#page=46
Last checked: 07/24/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: SB 610 .N62 v. 53 |
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