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| Web URL(s): | http://www.newss.org/proceedings/proceedings_2002_vol56.pdf#page=111
Last checked: 07/24/2013
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): | Lycan, D. W.;
Hart, S. E.;
Riego, D. C. |
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| Author Affiliation: | Lycan, Hart: Rutgers University, New Brunswick, NJ, Riego: Monsanto Company, St. Louis, MO |
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| Title: | MON 44940: A potential new herbicide for weed management in turfgrass species |
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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. 111-112. |
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| Publishing Information: | Ithaca, NY: Northeastern Weed Science Society |
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| # of Pages: | 2 |
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| Keywords: | TIC Keywords: Herbicides; Weed control; Poa annua control; Cool season turfgrasses; Poa pratensis; Lolium perenne; Festuca arundinacea; Festuca rubra
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| Cultivar Names: | Baron; Paragon; Coronado; Tiffany |
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| Abstract/Contents: | "Field experiments were conducted in 2000 and 2001 at the Rutgers Plant Science Research Center at Adelphia, NJ to evaluate MON 44940 for annual bluegrass (Poa annua L. ssp. annua) control and safety on various cool-season turfgrass species. All herbicide treatments were applied to mature stands of turf using a CO2 backpack sprayer delivering 40 gallons per acre. All MON 44940 treatments were applied with non-ionic surfactant (0.25% v/v). An annual bluegrass control study was established on September 9, 2000 on Kentucky bluegrass (Poa pratensis L. 'Baron'). Treatments consisted of MON 44940 at 0.005, 0.01, or 0.02 lbs ai/A applied as single applications in September, October, November, April, May, or June; three applications in the fall; three applications in spring; or three fall plus three spring applications. Single and sequential applications in the fall reduced annual bluegrass populations compared to the untreated check. However, annual bluegrass populations in these plots increased by the following summer. Single and sequential applications made in the spring did not significantly reduce annual bluegrass populations. Fall followed by spring sequential applications of MON 44940 at 0.01, 0.02, and 0.03 lbs ai/A reduced annual bluegrass populations from 33, 33, and 30% to 12, 4, and 1% respectively, from September 2000 to August 2001. In these aggressively treated plots, turf quality was lower compared to untreated check plots due to vigor reduction of Kentucky bluegrass and open areas created by annual bluegrass elimination. Turf tolerance studies were established on June 8, 2001 on Kentucky bluegrass 'Baron', perennial ryegrass (Lolium perenne L. 'Paragon'), tall fescue (Festuca arundinacea Schreb. 'Coronado'), and Chewings fine fescue (Festuca rubra L. ssp. falax Thuill. 'Tiffany'). Treatments consisted of single applications of MON 44940 at 0.005, 0.01, 0.02, 0.03, 0.04, and 0.06 lbs ai/A. Visual injury data and clipping weights were taken at 25 and 50 d after treatment (DAT). At 25 DAT, injury was evident in Kentucky bluegrass plots treated with 0.01 lbs ai/A or greater. Injury levels ranged from 8 to 33%. By 50 DAT, only plots treated with the highest rate showed significant signs of injury. Clipping weights revealed no significant difference between the untreated check and herbicide treated plots at either sampling data. Perennial ryegrass injury at 25 DAT increased with increasing rates of MON 44940 from 15% to 0.005 lbs ai/A to 43% at 0.06 lbs ai/A. However, by 50 DAT visual injury and clipping weight data revealed no significant difference between any treatments and the untreated check. All rates of MON 44940 significantly injured tall fescue at 25 DAT with injury levels ranging from 19 to 64%. Significant injury still persisted at 50 DAT in all but the lowest rate treatment. Clipping weights of all treatments were significantly lower at both sampling dates as compared to the untreated check. Chewings fescue injury at 25 DAT increased with increasing rates of MON 44940 from 15% at 0.005 lbs ai/A to 65% at 0.06 lbs ai/A. However, by 50 DAT visual injury and clipping weight data revealed no significant difference between any treatments and the untreated check. Initial injury of Kentucky bluegrass, perennial ryegrass, and Chewings fine fescue was in the form of discoloration and stunting. Significant stand thinning was only evident in the tall fescue study." |
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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):
Lycan, D. W., S. E. Hart, and D. C. Riego. 2002. MON 44940: A potential new herbicide for weed management in turfgrass species. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 56:p. 111-112. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_2002_vol56.pdf#page=111
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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