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| Web URL(s): | http://www.newss.org/proceedings/proceedings_1997_vol51.pdf#page=67
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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| Author(s): | Spackman, Chad W.;
Johnson, Jon M.;
Kuhns, Larry J. |
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| Author Affiliation: | Research Technologis, Project Assistant, and Professor of Ornamental horticulture, The Pennsylvania State University |
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| Title: | Evaluation of wildflower establishment in turfgrasses suppressed with herbicides |
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| Meeting Info.: | Newport, RI; January 6-9, 1997 |
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| Source: | Proceedings of the 51st Annual Meeting of the Northeastern Weed Science Society. Vol. 51, 1997, p. 67-68. |
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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: Establishment stage; Herbicide efficacy; Herbicide evaluation; Herbicide residues; Seeding; Wildflowers
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| Abstract/Contents: | "As part of a cooperative research project between the Pennsylvania Department of Transportation and the Pennsylvania Department of Transportation, a study was conducted in 1995 in which annual flowers were established in tall fescue (Festuca arundinacea Schreb.) suppressed with herbicides. The objective was to establish flowers in a suppressed turf that could be mowed in the fall, leaving a stand of established turf. A similar study was established in 1996. Treatments included an untreated check; glyphosate at 0.25, 050, 0.75, and 4 lbs/ac; ethephonâ‚‚/] at 8 lbs/ac; trinexapac-ethyl at 0.375 and 0.75 lbs/ac; ethephon plus trinexapac-ethyl at 8 and 0.375 lbs/ac, respectively; and imazameth at 0.032 lbs/ac plus 0.125% (v/v) QwikWet 357. All treatments contained Polytex A1001 drift control at 0.25% (v/v). The study area was arranged in a randomized complete block design with three replications. Treatments were applied to 6 by 10 ft plots in an unmowed, mixed stand of tall fescue and Kentucky bluegrass (Poa pratensis L.) on May 3, 1996, using a COâ‚‚-powered sprayer equipped with Spraying Systems XR 8004 VS spray tips, delivering 40 GPA at 35 psi. On May 10, 7 days after treatment (DAT), the untreated check was mowed to 1.25 in and clippings removed; the entire study area was verticut two times to a depth of 0.5 in and excess thatch was removed; plots treated with glyphosate at 4 lbs/ac were rototilled to simulate a conventional seeding method; and all plots were seeded with annual floweres at 12 lbs/ac. The annual flower mix contained 68% cosmos (Cosmos bipinnatus Cav.), 21.5% cornflower (Centaurea cyanus L.), and 10.5% tall plains coreopsis (Coreopsis tinctora Nutt.). The study area was mowed September 25. Turf green cover ratings were taken May 3; May 10; June 4, 32 DAT; July 25, 83 DAT; and October 10, 160 DAT. Average canopy height of the turf was measured at each rating period. A ground cover rating of weed pressure in each lot was taken September 10, 130 DAT. Ratings of ground cover and average heights of the flowers were taken July 25 and September 10. Results of turf ratings are reported in Table 1a and flower ratings in Table 1b. Plots initially showed no differences in the amount of desirable turf and contained little weed pressure. No turf was present throughout the study in the plots treated with 4 lbs glyphosate and rototilled. The mowed check, ethephon alone, and both trinexapac treatments alone, provided significantly more green cover on June 4 than all other treatments. Only the 0.75 lb rate of gylphosate significantly reduced the turf cober compared to the mowed check in July and October. Glyphosate severely injured the bluegrass but only suppressed the tall fescue. No differences in turf height were observed at any rating period, with initial heights of 5 in. and final heights of 14 in. There was a significant difference in the weed pressure at the end of the study, with glyphosate at 0.75 lb plots having 50 percent cover. Glyphosate treated plots at 0.5 and 4 lbs, also had significantly more weeds than the mowed check and plant growth regulator treatments. Glyphosate treated plots provided significantly higher wildflower cover than other treatments at both rating periods. At the September rating, glyphosate at 4 lbs provided the tallest wildflowers with an average of 50 in., and the other glyphosate plots had heights from 31 to 39 inches. The mowed check average height was 20 in. All three species germinated in all plots. Glyphosate at 4 lbs/ac plus rototilling resulted in increased wildflower cover and height, however no desirable turf remained Glyphosate at 0.75 lbs/ac resulted in increased wildflower cover and height but thinned the turf and had the highest percentage weed cover at the end of the study. Glyphosate at 0.5 lb/ac provided an acceptable stand of wildflowers and desirable turf. The mowed check and plant growth regulator treatments had no reduction in turf and little weed invasion, but had poor stands of wildflowers." |
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| Language: | English |
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| References: | 0 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Spackman, C. W., J. M. Johnson, and L. J. Kuhns. 1997. Evaluation of wildflower establishment in turfgrasses suppressed with herbicides. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 51:p. 67-68. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_1997_vol51.pdf#page=67
Last checked: 07/24/2013
Requires: PDF Reader
Notes: Item is within a single large file |
| 
MSU catalog number: SB 610 .N62 v. 51 |
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