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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Yelverton, F. H.;
Fagerness, M. J.;
Hinton, J. D. |
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| Author Affiliation: | Crop Science Department, North Carolina State University, Raleigh, NC |
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| Title: | Evaluation of ethephon and trinexapac-ethyl for foliar suppression of turfgrass species |
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| Section: | Section II: Weed management in turf, pasture and rangeland
Other records with the "Section II: Weed management in turf, pasture and rangeland" Section
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| Meeting Info.: | 53rd Annual Meeting, Tulsa, OK, January 24-26, 2000 |
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| Source: | Southern Weed Science Society Proceedings. Vol. 53, 2000, p. 48. |
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| Publishing Information: | Champaign, IL: Southern Weed Science Society. |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Ethephon; Trinexapac-ethyl; Growth regulators; Cynodon dactylon; Visual evaluation; Shoot density; Gibberellic acid; Ethylene; Comparisons; Festuca arundinacea; Clippings; Leaf tissue; Cynodon transvaalensis
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| Cultivar Names: | Arizona common; Tifway |
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| Abstract/Contents: | "Plant growth regulators (PGRs) are known to reduce biomass production in turf-type bermudagrass and also enhance turfgrass visual quality and shoot density. Most commercial PGRs in fine turf inhibit gibberellic acid but a new available formulation of ethephon instead alters ethylene production. Experiments were therefore conducted to compare the new ethephon material to commercial standard PGRs, with respect to foliar tissue production and turfgrass quality, on three turfgrass species. Tall fescue, `Arizona' common bermudagrass, and `Tifway' hybrid bermudagrass field plots were nontreated or treated with either trinexapac-ethyl (TE) or ethephon (EP) at 0.1 lb a.i./A or 5 oz./1000 ft2, respectively. Tall fescue was additionally treated with mefluidide (MF) at 24 oz./A while bermudagrass was additionally treated with paclobutrazol (PB) at 0.5 lb a.i./A. PGRs were applied initially to tall fescue 4-9-99 while bermudagrass species were treated 7-8-99 and 8-6-99. Beginning 1 week after initial treatment (WAIT), clippings were harvested weekly from equal-sized plot areas for each turfgrass species investigated. Clippings were collected through 13 WAIT for tall fescue maintained at 3" while clippings were collected through 9 WAIT for both bermudagrasses, which were maintained at 3/4". Turfgrass quality was visually assessed over the same intervals using a 1-9 scale: 1=dead, desiccated turf; 9=ideal turf). Analysis of variances was conducted on weekly dry weight clipping production or turfgrass quality data to assess treatment differences. Results demonstrated that, while EP had little effect on turfgrass quality forany [for any] species, it did effectively reduce foliar biomass production, particularly in tall fescue. Both TE and MF significantly reduced tall fescue quality through 7 WAIT. Foliar suppression from EP in the two bermudagrasses was either absent or more more briefly observed. TE was the most effective suppressor of foliar biomass in either bermudagrass species but briefly reduced turfgrass quality 1-2 WAIT. PB only showed foliarsuppression [foliar suppression] in `Tifway' bermudagrassand [bermudagrass and] had little impact on bermudagrass quality. Post inhibition growth enhancement was clearly evident in tall fescue 11-13 WAIT with MF or TE, was suggested in common bermudagrass with EP or PB, and was not evident in `Tifway' bermudagrass. Overall, results suggest EP may be more suitable for use in tall fescue than TE or MF. However, EP was relatively ineffective in bermudagrass, suggesting limited utility as compared to gibberellin inhibitors such as TE or PB." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Yelverton, F. H., M. J. Fagerness, and J. D. Hinton. 2000. Evaluation of ethephon and trinexapac-ethyl for foliar suppression of turfgrass species. South. Weed Sci. Soc. Proc. 53:p. 48. |
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