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| Web URL(s): | http://www.swss.ws/wp-content/uploads/docs/2006 Proceedings-SWSS.pdf#page=176
Last checked: 07/22/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Waltz, F. C. Jr.;
White, J. L. Jr.;
Murphy, T. R. |
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| Author Affiliation: | The University of Georgia, Griffin, GA |
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| Title: | Seashore paspalum (Paspalum vaginatum) response to trinexapac-ethyl tank mix combinations with flurprimidol |
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| Section: | Weed management in turf grass
Other records with the "Weed management in turf grass" Section
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| Meeting Info.: | San Antonio, Texas: January 23-25, 2006 |
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| Source: | Proceedings: Southern Weed Science Society 59th Annual Meeting. Vol. 59, 2006, p. 103. |
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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: Flurprimidol + Trinexapac-ethyl; Growth regulator evaluation; Paspalum vaginatum; Responses; Tank mix
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| Abstract/Contents: | "Over the past 40 years, the use of plant growth regulator (PGRs) to reduce shoot growth have been reported to lessen the effects of mowing, reduce labor costs, aid in maintaining difficult areas, improve worker safety, reduce organic waste, and improve plant water conservation. Seashore paspalum (Paspalum vaginatum Swartz) is a prostrate, salt tolerant grass that is indigenous to tropical and coastal areas worldwide. This grass can be irrigated with salt and brackish water and tolerates drought and low mowing heights used on golf course fairways and sports fields. Because of these attributes, improved cultivars of seashore paspalum have been recently released for use in the southern United States and tropical areas of the world. There is minimal published research on the response of seashore paspalum to common PGRs. For acceptance in the turf market PGRs must suppress vertical shoot growth, without adversely inhibiting root growth, lateral stolon development, or cause objectionable discoloration (injury). Previous research on bermudagrass (Cynodon spp.) has reported "moderate" discoloration from single PGR applications lasting 2 to 4 weeks. Since height suppression typically lasts 4 to 6 weeks, multiple applications are necessary during the growing season and long-term discoloration is undesirable. Also, duration of height suppression has been shown to be rate dependent, with shorter effects at lower rates. Therefore, tank mix combinations of PGRs at below label rates may provide acceptable growth suppression without discoloration. During summers of 2004 and 2005, a study was initiated to investigate the effect of repeated PGR tank mix combinations on 'Sea Isle 1' seashore paspalum. Plots were 5 feet x 10 feet in a randomized complete block design with 3 replications. Using a CO2 backpack sprayer set to deliver 25 gpa, treatments were applied on July 1 both years with two sequential applications 28 day apart, for a total of three applications. The plots were maintained similar to a sports field, mowed twice weekly at ¾ -in, and irrigated to prevent drought stress. Treatments included two rates of trinexapac-ethyl (4.0 and 6.0 oz product/acre), 3 rates of flurprimidol (4.0, 6.0, and 8.0 oz product/acre), and all tank mix combinations. A nontreated control was also included. Turfgrass quality, a visual assessment including turfgrass color, canopy density, texture, and overall health, was evaluated on a 1 to 9 scale, 1= poor quality or dead turf and 9= high quality, healthy turf, 7 was considered minimally acceptable. Turfgrass color was evaluated by several methods. Visual color was rated on a 1 to 9 scale, 1= brown, dead turf and 9= dark green grass, 7 was considered minimally acceptable. The Spectrum Technologies Turf Color Meter (TCM 500) was used to objectively assess color. In 2005, color was also measured using digital imaging technology. Using a Toro walk-behind reel-type mower set at ¾ inch, clippings were collected from a 17 feet2 area centered in the plots. Percent clipping reduction was calculated after clippings were dried and weighed. At the rates tested, multiple applications of flurprimidol and trinexapac-ethyl, alone or in tank mix combination, were non-injurious to seashore paspalum. No injury was observed at any of the two-year rating dates. Turfgrass quality, visual color, and TCM 500 color ratings were acceptable (>= 7) for all treatments, including the control, both years. The trend from digital color analysis was that treatments containing the 6.0 oz/acre rate of trinexapac-ethyl had darker green color. In general, as the total amount of PGR applied to the turfgrass increased, the greater the clipping reduction compared to the nontreated. Similar to the digital color analysis, treatments with 6.0 oz/acre of trinexapac-ethyl had a repressive trend on clipping weights. Tank mix combinations of flurprimidol at 4.0 or 6.0 oz/acre and 6.0 oz/acre trinexapac-ethyl reduced clippings 38% to 90% below the nontreated plots. This research showed that seashore paspalum vegetative growth can be effectively reduced over an extended period with flurprimidol and trinexapac-ethyl. Tank mix combinations of these PGRs can substantially reduce clippings without decreasing aesthetic qualities." |
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| Language: | English |
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| References: | 0 |
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| Note: | "Vision for the future"
This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Waltz, F. C. Jr., J. L. Jr. White, and T. R. Murphy. 2006. Seashore paspalum (Paspalum vaginatum) response to trinexapac-ethyl tank mix combinations with flurprimidol. South. Weed Sci. Soc. Proc. 59:p. 103. |
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| Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2006 Proceedings-SWSS.pdf#page=176
Last checked: 07/22/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: b2207931 |
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