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| Web URL(s): | http://www.newss.org/proceedings/proceedings_2003_vol57.pdf#page=109
Last checked: 07/23/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Hart, S. E.;
Derr, J. F.;
Rose-Fricker, C.;
Lycan, D. W.;
Meyer, W. A. |
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| Author Affiliation: | Hart: Rutgers University, New Brunswick, New Jersey; Derr: Virginia Tech University, Virginia Beach, Virginia; Rose-Ficker: Pure seed testing, Hubbard, Oregon; Lycan and Meyer: Rutgers University, New Brusnwick, New Jersey |
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| Title: | Field Experiments |
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| Meeting Info.: | Hyatt Regency Hotel, Baltimore, MD: January 6-9, 2003 |
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| Source: | Proceedings of the 57th Annual Meeting of the NortheasternWeed Science Society. Vol. 57, 2003, p. 109. |
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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: Application frequency; Cultivar evaluation; Festuca arundinacea; Festuca rubra subsp. commutata; Fine fescues; Glyphosate; Herbicide injury; Herbicide resistance
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| Abstract/Contents: | "Field experiments were conducted in 2002 at the Rutgers Plant Science Research Center in Adelphia, NJ and at the Virginia Tech, Hampton Roads Agricultural Research and Extension Center in Virginia Beach, VA to evaluate the tolerance of tall fescue (Festuca arundinacea `Pure Gold' and 'Tomohawk RT') and hard-fine fescue (Festuca Iongifolia `Aurora Gold') to direct applications of glyphosate. These fescue varieties had been selected for increased glyphosate tolerance by recurrent selection. Tall fescue varieties `Tomohwak' and hard-fine fescue variety 'Intrigue' (NJ) and 'Discover' (VA) which had not undergone recurrent selection were also included in the study. All varieties were established in the fall of 2001. In the spring/summer of 2002 glyphosate was applied one, two or three times at four to five week intervals at application rates of 0.05, 0.09, 0.188, 0.38, 0.56, 0.75 and 1.5 lbs ae/A. Initial applications were made on May 10 and May 16 at VA and NJ, respectively. All herbicide applications were applied with a C2 backpack sprayer delivering 40 gallons per acre. Single applications of glyphosate at 0.56 lb/A and multiple applications at 0.19 lb/A caused a significant visual injury to all three tall fescue varieties. In some cases `Pure Gold' and `Tomohawk' exhibited a higher degress of tolerance to glyphosate than `Tomohawk'.. However, this increase in tolerance may not be sufficient to allow for the direct use of glyphosate at application rates required for weed control. Single applications of glyphosate at 0.56 lb/A and 0.38 lb/A caused significant visual injury to susceptible fine fescue lines `Discover' and `Intrigue'. Glyphosate injury increased on these lines as subsequent applications were appied at these rates. In contrast, fine fescue variety `Aurora Gold' was tolerant (<20% visual injury one month after treatment) to single applications of glyphosate up to 0.75lb/A and was showing recovery from 1.5 lb/A into August. `Aurora Gold' exhibited this same level of tolerance to multiple applications of glyphosate at 0.56 lb/A in VA and 0.75 lb/A in NJ. The results of these studies suggest that conventional plant breeding techniques can be utilized to increase the level of glyphosate tolerance in tall and fine fescue. However, increases in tolerance in tall fescue may not be sufficient enough to allow for direct use of glyphosate for weed control proposes. Increases in glyphosate tolerance in fine fescue were significant, and tolerance levels in `Aurora Gold' fine fescue may be sufficient to allow for direct use of glyphosate at rates as high as 0.75 lb/A. |
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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):
Hart, S. E., J. F. Derr, C. Rose-Fricker, D. W. Lycan, and W. A. Meyer. 2003. Field Experiments. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 57:p. 109. |
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| Choices for finding the above item: |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_2003_vol57.pdf#page=109
Last checked: 07/23/2013
Requires: PDF Reader
Notes: Item is within a single large file |
| 
MSU catalog number: SB 610 .N62 v. 57 |
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