| |
| Web URL(s): | http://www.newss.org/proceedings/proceedings_2000_vol54.pdf#page=99
Last checked: 07/24/2013
Requires: PDF Reader
Notes: Item is within a single large file |
|---|
| Publication Type:
| Report |
|---|
| Content Type: | Abstract or Summary only |
|---|
| Author(s): | Hart, S. E.;
Lycan, D. W. |
|---|
| Author Affiliation: | Hart: Assistant Professor, New Jersey Agricultural Experiment Station, Cook College, Rutgers, The State University of New Jersey New Brunswick, NJ; Lycan: Program Associate, New Jersey Agricultural Experiment Station, Cook College, Rutgers, The State College of New Jersey, New Brunswick, NJ |
|---|
| Title: | Annual bluegrass (Poa annua) control with ethofumesate |
|---|
| Section: | Turfgrass and plant growth regulators
Other records with the "Turfgrass and plant growth regulators" Section
|
|---|
| Meeting Info.: | Baltimore, MD: January 3-6, 2000 |
|---|
| Source: | Proceedings of the 54th Annual Meeting of the Northeastern Weed Science Society. Vol. 54, 2000, p. 99. |
|---|
| Publishing Information: | College Park, MD: Northeastern Weed Science Society |
|---|
| # of Pages: | 1 |
|---|
| Keywords: | TIC Keywords: Poa annua control; Golf fairways; Ethofumesate; Agrostis tenuis; Agrostis stolonifera; Lolium perenne; Application rates; Application timing; Urea; Iron chelates; Paclobutrazol; Herbicide application; Herbicide injury; Heat stress; Seedhead inhibition
|
|---|
| Cultivar Names: | SR 7100 |
|---|
| Abstract/Contents: | "Field Experiments were conducted in 1999 at the Rutgers University Experimental Horticultural Farm II in New Brunswick, NJ and the Little Mill Country Club in Marlton, NJ to evaluate spring and summer applications of ethofumesate for control of annual bluegrass in bentgrass fairways maintained at a mowing height of 9 mm. At Horticultural Farm II, the turf was colonial bentgrass (Agrostis tenuis) variety 'SR 7100' infested with approximately 40% P. annua while the turf at Little Mill was a mixture of unknown varieties of creeping bentgrass (Agrostis palustris) and perennial ryegrass (Lolium perenne) infested with approximately 60% P. annua. Ethofumesate applications were initiated on April 5 and applied 8 times at approximately 3-week intervals throughout the spring and summer. Ethofumesate was applied four times at 1.7, 1.1 or 0.8 kg ai/h followed by four applications of 0.8, 0.6 or 0.4 kg/h, respectively. All ethofumesate applications were applied with 4.8 kg/h of urea and 9.1 kg/h iron chelate. One application of paclobutrazol at 0.6 kg/h applied late April was also evaluated for control of P. annua. All herbicide applications were applied with a CO₂ backpack sprayer delivering 740 L/ha. Ethofumesate applied twice at 1.7, 1.1, or 0.8 kg/h provided 59, 62-82 and 80-83% P. annua seedhead suppression as compared to untreated plots on May 20th. Prior to the onset of high summer temperatures, three applications of ethofumesate at 1.7, 1.1, or 0.8 kg/h reduced P. annua populations at Horticultural Farm II from 38 to 22, 16 and 22%, respectively. However, injury to bentgrass was 25, 15, and 5% respectively. Paclobutrazol reduced P. annua populations to 26% with no bentgrass injury. At Little Mill three applications of ethofumesate at 1.7, 1.1, or 0.8 kg/h reduced P. annua populations from 62 to 16, 23 and 32% respectively. However, injury to bentgrass was 55, 53, and 33%, respectively. Paclobutrazol reduced P. annua populations to 34% with no bentgrass injury. Throughout the summer P. annua populations declined in the untreated plots due to summer heat stress, but appreciable increases in P. annua control were not detected with additional applications of ethofumesate while bentgrass turf quality continued to be lower as compared with untreated or paclobutrazol treated bentgrass. In September, following all eight applications of ethofumesate, P. annua populations were only significantly than untreated plots at Little Mill when ethofumesate was applied at the highest application rates. The results of these studies suggest that spring applications of ethofumesate may potentially provide seedhead and substantial population reductions of P. annua. However, summer application of ethofumesate could not further reduce P. annua populations and continued to cause unacceptable injury to bentgrass. The vigor reduction of bentgrass may have allowed P. annua to more easily reinfest the ethofumesate treated plots in late summer." |
|---|
| Language: | English |
|---|
| References: | 0 |
|---|
| Note: | This item is an abstract only! |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hart, S. E., and D. W. Lycan. 2000. Annual bluegrass (Poa annua) control with ethofumesate. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 54:p. 99. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=65347 |
| If there are problems with this record, send us feedback about record 65347. |
| Choices for finding the above item: |
|---|
| Web URL(s):
http://www.newss.org/proceedings/proceedings_2000_vol54.pdf#page=99
Last checked: 07/24/2013
Requires: PDF Reader
Notes: Item is within a single large file |
| 
MSU catalog number: SB 610 .N62 v. 54 |
| Find from within TIC:
Digitally in TIC by file name: newss2000 |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
