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| Web URL(s): | http://www.newss.org/proceedings/proceedings_2000_vol54.pdf#page=97
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): | Watschke, T. L.;
Borger, J. A. |
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| Author Affiliation: | Watschke: Professor, Department of Agronomy, Pennsylvania State University, University Park, PA; Borger: Research Assistant, Pennsylvania State University, University Park, PA |
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| Title: | Control of Poa annua from multiple seasonal applications of ethofumesate in 1998 and 1999 |
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| Section: | Turfgrass and plant growth regulators
Other records with the "Turfgrass and plant growth regulators" Section
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| Meeting Info.: | Baltimore, MD: January 3-6, 2000 |
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| Source: | Proceedings of the 54th Annual Meeting of the Northeastern Weed Science Society. Vol. 54, 2000, p. 97-98. |
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| Publishing Information: | College Park, MD: Northeastern Weed Science Society |
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| # of Pages: | 2 |
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| Keywords: | TIC Keywords: Trinexapac-ethyl; Poa annua control; Herbicide application; Ethofumesate; Lolium perenne; Agrostis stolonifera; Application rates; Application timing
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| Cultivar Names: | Penncross |
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| Abstract/Contents: | "Two of the studies were conducted during 1998 using multiple applications of ethofumesate throughout the season for the control of Poa annua. One study was conducted at the State College Elks Country Club, Boalsburg, PA on a mature stand of Poa annua and perennial ryegrass (#13 fairway). The other study in 1998 was conducted at the Valentine Turfgrass Reseach Center, University Park, PA on a mature stand of Poa annua and creeping bentgrass (simulated fairway). In 1999, a similar study was conducted on a mixed stand of creeping bentgrass ('Penncross') and Poa annua at the Valentine Turfgrass Research Center, Penn State University, University Park, PA. This study at the Elks Country Club was a randomized complete block design with 3 replications. Treatments (ethofumesate 1.5EC at 0.25, 0.5, 0.75, 1.0 lbs ai/A) were applied on June 8, 1998 and were reapplied every 21 days until September 18, 1998 using a three-foot hand held CO₂ powered boom sprayer with two 6504 flat fan nozzles calibrated to deliver 40 GPA at 30 psi. In addition, a separate area was treated using ethofumesate 1.5EC at a rate of 0.75 lb ai/A on Sept 30, Oct 27, and Nov 19, 1998 using the aforementioned equipment and application methods. This area was treated to provide a comparison for control resulting from a more conventional timing of application. The second study in 1998 conducted at the Valentine Center was a randomized complete block design with 3 replications. Treatments (ethofumesate 1.5EC at 0.25, 0.5, 0.75, 1.0 lbs ai/A) were applied on April 23, 1998 and were reapplied ever 21 days until September 18, 1998 using a three-foot hand held CO₂ powered boom sprayer with two 6504 flat fan nozzles calibrated to deliver 40 GPA at 30 psi. Again a reference area was treated using ethofumesate 1.5EC at a rate of 0.75 lb ai/A on Sept 30, Oct 27 and Nov 19, 1998 using the afore mentioned [aforementioned] equipment and application methods. The 1999 study at the Valentine Center was a randomized complete block design with three replications. All of the treatments (ethofumesate 1.5EC at 0.75, 1.0, 1.5 lbs ai/A) were applied on April 15, and May 12, 1999 using a three-foot hand held CO₂ powered boom sprayer calibrated to deliver 40 gpa using two, flat fan, 6504 nozzles at 40 psi. Sequential applications of all treatments except Turf Enhancer were made on June 9, and 30, July 21, Aug 11, Sept 1,and Oct 1, 1999 using the afor mentioned [aforementioned] technique. Results form [from] the Elks Country Club study showed that the lowest rate of ethofumesate tended to increase the amount of Poa annua from June 6, 1998 until May 5, 1999. The 0.75 lb ai/A rate appeared to have no effect, while the high rate (1.0 lb ai/A) tended to cause a slight decrease in the amount of Poa annua. The fall application of 0.75 lb ai/A applied three times (September, October, and November) resulted in a substantial reduction in Poa annua when compared to the lower rate, sequential seasonal applications. In the 1998 study at Valentine Center, control of Poa annua was evaluated approximately one year after treatments were initiated. In all cases, including the control, the amount of Poa annua in the plots increased. Ethofumesate applied at 1.0 lb ai/A and ethofumesate at 0.25 lb ai/A in combination with Primo at 0.25 lb ai/A resulted in a significant increase in the amount of Poa annua compared to untreated turf. As in the study at the Elks Country Club, the fall applications (three times at 0.75 lb ai/A) used as a reference reduced Poa annua by 92%. Results from the 1999 study at the Valentine Center showed that increasing the rate of ethofumesate to 1.5 lb ai/A for each application did not improve control. Ethofumesate applied eight times at 0.75 lb ai/A resulted in a 64% reduction in Poa annua from May 5 to the Aug 31 rating date. Additions of urea and Sprint tended to reduce (antagonize) control at all rates." |
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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):
Watschke, T. L., and J. A. Borger. 2000. Control of Poa annua from multiple seasonal applications of ethofumesate in 1998 and 1999. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 54:p. 97-98. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_2000_vol54.pdf#page=97
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. 54 |
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