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| Web URL(s): | http://www.swss.ws/wp-content/uploads/docs/2005 Proceedings-SWSS.pdf#page=355
Last checked: 07/18/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Bunnell, B. T.;
Cooper, R. B. |
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| Author Affiliation: | Bunnell: SePRO Corporation, Carmel, IN; Cooper: TotalTurf Consulting LLC, Hilton Head Island, SC |
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| Title: | Innovations with Cutless 50W applictions [applications] to turf |
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| Section: | New developments in industry
Other records with the "New developments in industry" Section
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| Meeting Info.: | Charlotte, North Carolina: January 24-26, 2005 |
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| Source: | Proceedings of the 58th Annual Meeting of the Southern Weed Science Society. Vol. 58, 2005, p. 275. |
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| Publishing Information: | Champaign, Illinois: Southern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Bent versus Poa; Flurprimidol; Golf fairways; Growth regulators; Paclobutrazol; Poa annua control
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| Trade Names: | Cutless 50W; Trimmit 2SC |
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| Abstract/Contents: | "Plant growth regulators (PGR) such as Cutless 50W (flurprimidol) and Trimmit 2SC (paclobutrazol) are frequently used for Poa annua management in creeping bentgrass golf greens, fairways, and tees. These PGRs selectively suppress the growth of Poa annua to a greater degree compared to creeping bentgrass, hence shifting the competitive growth advantage away from Poa annua and towards creeping bentgrass. Therefore, over time, creeping bentgrass is able to grow laterally into the suppressed Poa annua stand, resulting in successful conversion. The objective of this study was to evaluate the lateral regrowth (RG) potential of creeping bentgrass golf course fairways and greens following applications of flurprimidol and paclobutrazol. Two studies were performed for 8 wks from 15 June to 10 August, 2004 on an established creeping bentgrass golf green and fairway in Westfield, IN. In the golf green study, treatments included Cutless 50W and Trimmit 2SC at 0.125 and 0.25 lbs ai/A and Primo MAXX 1EC (trinexapac-ethyl) at 0.05 lbs ai/A. In the fairway study, treatments included Cutless 50W and Trimmit 2SC at 0.25 and 0.50 lbs ai/A and a tank mix containing Cutless 50W plus Primo MAXX 1EC at 0.125 plus 0.05 lbs ai/A, respectively. Applications were made on 15 June and 16 July, 2004. In order to evaluate lateral RG of creeping bentgrass, soil cores were extracted from each replicate plot prior to PGR application and backfilled with topdressing sand. The diameters of the soil cores were 5 cm for the golf green study and 11 cm for the fairway study. Soil cores were approximately 10 cm deep. In order to measure lateral RG, a wire mesh grid was constructed equal to the dimension of the original extracted core. The grid contained 210 and 80 square holes (0.4 cm2 in area) for the fairway and golf green study, respectively. A green shoot present in a 0.4 cm2 square denoted a RG point. Digital images were taken every 2 weeks with the wire mesh grid overlaying the backfilled soil core and percent lateral RG was calculated with the equation: [green shoot RG points/total squares (210 or 80)]. In the golf green study, at 2 weeks after the initial application (WAIT) no differences in lateral RG occurred between treatments. However, by 4 WAIT, Trimmit 2SC at 0.25 lbs ai/A reduced lateral RG compared to all treatments by 9 to 13%. By 6 WAIT or 2 weeks after the second application, Trimmit 2SC at 0.25 lbs ai/A reduced lateral RG by 12% compared to untreated plots and Primo MAXX 1EC and 8 to 11% compared to both rates of Cutless 50W. Trimmit 2SC at 0.125 lbs ai/A maintained 8% greater lateral RG compared to the 0.25 lbs ai/A rate. Similar results were found in the fairway study where rates of Cutless 50W and Trimmit 2SC were doubled compared to the rates used in the golf green study. At 2 WAIT, Cutless 50W at 0.5 lbs ai/A and untreated plots maintained>=?6% lateral RG compared to other treatments. By 4 WAIT, Trimmit 2SC at 0.5 lbs ai/A reduced lateral RG by 11 to 13% compared to Cutless 50W at 0.25 and 0.5 lbs ai/A. Therefore, after one application, Trimmit 2SC reduced lateral RG by 13% compared to Cutless 50W when both PGRs were applied at 0.5 lbs ai/A. Trends continued at 6 WAIT, with Trimmit 2SC at 0.5 lbs ai/A reducing lateral RG by 12 to 14% compared to treatments containing Cutless 50W and the untreated. At the final rating date, at 8 WAIT, plots receiving Trimmit 2SC at 0.5 lbs ai/A reached 82% total RG, whereas Cutless 50W at 0.5 lbs ai/A reached 98%. The tank mix containing Cutless 50W + Primo MAXX 1EC did not influence lateral RG at any rating date. Lateral RG differences occurred between Cutless 50W and Trimmit 2SC when applied to creeping bentgrass golf greens and fairways. At the final rating date, the high rates of Trimmit 2SC reduced creeping bentgrass lateral RG significantly by 11 and 16%, respectively, compared to plots receiving the same ai/A rate of Cutless 50W in the golf green and fairway study. The low rate of Trimmit 2SC did not reduce lateral RG in either study. Additionally, in both studies, the lateral RG of creeping bentgrass following Cutless 50W applications at 0.25 and 0.5 lbs ai/A did not differ from untreated plots at study's end. The Cutless 50W + Primo MAXX 1EC tank mix and Primo MAXX 1EC alone and did not significantly influence lateral RG of creeping bentgrass in either study. Future research will investigate the effects of various rates and timings of Cutless 50W and Trimmit 2SC on the lateral RG of creeping bentgrass and other perennial turf species such as Kentucky bluegrass and perennial ryegrass. Future studies will also evaluate lateral RG of creeping bentgrass with a yearly program consisting of 4 to 6 applications of Cutless 50W and Trimmit 2SC at various rates." |
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| Language: | English |
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| References: | 0 |
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| Note: | "The changing world of weed science"
This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Bunnell, B. T., and R. B. Cooper. 2005. Innovations with Cutless 50W applictions [applications] to turf. South. Weed Sci. Soc. Proc. 58:p. 275. |
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| Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2005 Proceedings-SWSS.pdf#page=355
Last checked: 07/18/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: b2207931 |
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