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| Web URL(s): | http://www.newss.org/proceedings/proceedings_1993_vol47.pdf#page=104
Last checked: 07/24/2013
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Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Gover, Arthur E.;
Watschke, Thomas L.;
Batey, David A. |
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| Author Affiliation: | Gover: Project Associate; Watschke: Professor of Turfgrass Science; and Batey: Research Aide, The Pennsylvania State University, University Park, PA |
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| Title: | Effect of spray adjuvants on the activity of plant growth regulators applied to tall fescue |
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| Section: | Turfgrass and plant growth regulators - Wednesday January 6
Other records with the "Turfgrass and plant growth regulators - Wednesday January 6" Section
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| Meeting Info.: | Baltimore, MD: January 4-7, 1993 |
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| Source: | Proceedings of the 47th Annual Meeting of the Northeastern Weed Science Society. Vol. 47, 1993, p. 104-105. |
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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: Adjuvants; Growth regulators; Festuca arundinacea; Comparisons; Mefluidide; Chlorsulfuron; Tank mix; Imazethapyr; Imazapyr; Color; Quality; Clipping weight; Dry weight; Height; Growth
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| Cultivar Names: | Cimmaron; Bonanza; Olympia |
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| Abstract/Contents: | "As part of a cooperative project with the Pennsylvania Department of Transportation, studies were conducted in 1991 and 1992 to evaluate the effect of different spray adjuvants on the activity of plant growth regulator (PGR) treatments applied to tall fescue (Festuca arundinacea Schreb.). The adjuvant treatments included no additional spray adjuvant; X-77, a synthetic, non-ionic spreader-sticker; CideKick II, a d-limonene based, non-ionic spreader-sticker-penetrant; and Clean Cut and HyGrade Plus, two petroleum based crop oil concentrates. The PGR treatments used in 1991 were mefluidide at 0.38 lb ai/ac, and mefluidide plus chlorsulfuron at 0.19 plus 0.012 lb ai/ac, respectively. The PGR treatments used in 1992 were mefluidide plus a commercial premix of imazethapyr and imazapyr at 0.12 plus 0.046 (0.44 plus 0.0016) lb ai/ac, respectively; and mefluidide plus chlorsulfuron at the same rates as in 1991. The study was conducted each year on a blend of 'Cimmaron', 'Bonanza', and 'Olympia' tall fescues, maintained at 3.5 in, at the Penn State Landscape Management Research Center, University Park, PA. The experimental design used both years was a randomized complete block with a split-plot treatment arrangement, with PGR as the whole plot treatment and spray adjuvent as the sub-plot treatment, with three replications. Application equipment for both studies was a CO₂-powered, hand-held boom equipped with Spraying Systems 8002 flat fan spray tips. Treatments were applied to 6 by 15 plots in 17 gal/ac at 30 psi on May 3, 1991; and to 3 by 15 plots in 16 gal/ac at 24 psi on May 1, 1992. In 1991, dicamba was tank-mixed with all treatments at 0.5 lb/ai/ac, and in 1992, a premix of 2,4-D, MCPP, and dicamba was tank-mixed with all treatments at 1.0, 1.0, plus 0.5 lb ai/ac, respectively. In 1991, a visual rating of turf color and quality was taken May 21, 18 days after treatment (DAT), using a scale of 1 to 9, where '1'=dead turf, '9'=ideal, and '5' is the lowest acceptable rating for low maintenance turf. Turf canopy height was measured June 5 (33 DAT) using a 12 in wide by 0.25 in thick wooden disk mounted on a 3 ft ruler, which was dropped from a height of 3 ft onto the turf, and the height the disk was suspended above the ground was recorded. Three height measurements were taken per plot. Fresh clipping weights were taken June 13 and July 16 (41 and 74 DAT), using a 20 in rotary mower with a cutting height of 3.5 in. Subsamples were taken at the 41 DAT harvest, and weighed fresh and dry to determine dry matter content and dry weight clipping yields. The plots were irrigated at 0.75 in/week between the two clippings harvests, to enhance recovery from the drought conditions present during the study. Data collected in 1992 included a visual rating of turf color and a measurement of vegetative canopy height on May 27 (26 DAT), and a fresh clipping harvest using a 20 in rotary mower with a cutting height of 3.0 in on June 18 (48 DAT). Seedhead suppression was excellent for all treatments both years. There was no significant interaction between PGR treatment and spray adjuvant in either year. PGR treatment did not have a significant effect on any dependent variable in 1991. In 1992, there was a turf color difference, as all plots treated with mefluidide plus imazethapyr and imazapyr received a rating of '6', and all plots treated with mefluidide plus chlorsulfuron were rated a '5'. In 1991, spray adjuvant had a significant effect on turf color only, with Clean Cut receiving a lower rating than turf treated with no adjuvant of CideKick II (Table 1a). IThere [There] was no significant effect on any dependent variable due to adjuvant treatment in 1992 (Table 1b). Under conditions of this study, which included drought conditions both years, the addition of spray adjuvants to PGR treatments applied to tall fescue did not influence the activity of the treatments, except for minor turf color differences observed in 1991 only, despite the range of penetrating abilities of the adjuvants." |
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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):
Gover, A. E., T. L. Watschke, and D. A. Batey. 1993. Effect of spray adjuvants on the activity of plant growth regulators applied to tall fescue. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 47:p. 104-105. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_1993_vol47.pdf#page=104
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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