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Web URL(s): | http://www.newss.org/proceedings/proceedings_1998_vol52.pdf#page=109 Last checked: 07/24/2013 Requires: PDF Reader Notes: Item is within a single large file |
Publication Type:
| Report |
Author(s): | Johnson, Jon M.;
Spackman, Chad W.;
Kuhns, Larry J. |
Author Affiliation: | Project Assistant, Research Technologist, and Professor of Ornamental Horticulture, The Pennsylvania State University, University Park, PA. |
Title: | Evaluation of glufosinate-ammonium for total vegetation control under guiderails |
Section: | Industry, forestry and conservation Wednesday-January 7, 1998 Other records with the "Industry, forestry and conservation Wednesday-January 7, 1998" Section
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Meeting Info.: | Washington, DC: January 5-8, 1998 |
Source: | Proceedings of the 52nd Annual Meeting of the Northeastern Weed Science Society. Vol. 52, 1998, p. 109-110. |
Publishing Information: | College Park, MD: Northeastern Weed Science Society |
# of Pages: | 2 |
Keywords: | TIC Keywords: Ammonium; Glufosinate; Herbicide efficacy; Herbicide evaluation; Non-selective herbicides; Roadside turf; Weed control
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Abstract/Contents: | "Many preemergence herbicides, alone or in combination, have not consistently provided season long weed control along roadsides in Pennsylvania. One system being evaluated is delaying the application of the preemergence herbicides until later in the spring and including a postemergence herbicide with them. This would control the weeds before they could fully mature and possibly allow the preemergence products to remain efective through the remainder of the growing season. A study evaluating glufosinate-ammonium for total vegetation control along roadsides was initiated as part of a cooperative project between The Pennsylvania State University and The Pennsylvania Department of Transportation. Roadside treatments were applied to 3 by 25 ft plots along a guiderail on SR 2002 near Blairsville, PA on May 23, 1997. The study was arranged in a randomized complete block design with three replications. The treatments were applied using a CO₂-powered hand held sprayer equipped with two Spraying Systems OC-04 spray tips, delivering 35 GPA at 28 psi. All treatments except those with glyphosate contained 0.125% (v/v) QwikWet 357 surfactant and all contained 0.25% (v/v) Polytex A1001 drift control agent. Green cover ratings of weeds were taken the day of application; June 5, 13 days after treatment (DAT); June 23, 31 DAT; July 18, 56 DAT; September 11, 111 DAT; and October 13, 143 DAT. Predominant weed species were white sweetclover (Melilotus alba Medik.), wild carrot (Daucus carota L.), common ragweed (Ambrosia artemisiifolia L.), common evening primrose (Oenothera beinnis L.), Virginia creeper (Parthenocissus quinquefolia (L) Planch.), quackgrass (Elytrigia repens (L.) nevski), and chicory (Cichorium intybus L.). The fringe of the study area was treated on July 2, 1997 with a mixture of 4% (v/v) glyphosate, 1% (v/v) triclopyr, 0.125% (v/v) QwikWet 357 surfactant, and 0.25% (v/v) Polytex A 1001 drift control agent to control poison ivy (Toxicodendron radicans L.) and Virginia creeper that was encroaching into the site. The initial rating at the time of application showed there were no significant differences in vegetative cover among the plots, with average green cover ratings between 58 and 80 percent. Glufosinate alone provided fair control of the weeds for a short time following application, but weeds steadily regrew in the plots and by 111 DAT there was no difference between the treated and untreated areas. Sulfometuron methyl plus diuron reduced the level of weeds in the plots until the final rating period, but not to acceptable levels. Glufosinate plus imazapyr provided very good early season control, but by 111 DAT the weed cover in treated plots was not significantly different from the untreated plots. Adding glufosinate to either sulfometuron methyl and diuron; 2, 4-D and sulfometuron methyl; or 2, 4-D, sulfometuron methyl and diuron provided good post- and preemergence activity with all green cover ratings ranging between 4 and 17 percent from 31 to 111 DAT. Beyond 31 DAT there were no statistical differences found when any of the rates of glufosinate tested in this study were replaced with 1.5 lbs/ac glyphosate and combined with either 0.14 lb/ac sulfometuron methyl plus 4.8 lb/ac diuron or 0.95 lb/ac 2,4-D plus 0.14 lb/ac sulfometuron methyl." |
Language: | English |
References: | 0 |
Note: | Table |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Johnson, J. M., C. W. Spackman, and L. J. Kuhns. 1998. Evaluation of glufosinate-ammonium for total vegetation control under guiderails. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 52:p. 109-110. |
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| Web URL(s): http://www.newss.org/proceedings/proceedings_1998_vol52.pdf#page=109 Last checked: 07/24/2013 Requires: PDF Reader Notes: Item is within a single large file |
| MSU catalog number: SB 610 .N62 v. 52 |
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