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| Web URL(s): | http://www.plantmanagementnetwork.org/pub/trial/pdmr/volume3/abstracts/t24.asp
Last checked: 08/31/2009
Notes: Report summary
https://www.plantmanagementnetwork.org/pub/trial/pdmr/reports/2009/T024.pdf
Last checked: 11/11/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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| Publication Type:
| Report |
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| Author(s): | Smith, D. L.;
Walker, N. R. |
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| Author Affiliation: | Department of Entomology and Plant Pathology, Oklahoma State University, Stillwater, Oklahoma |
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| Title: | Effects of DMI fungicides and Primo MAXX on 'U-3', 'Riviera', and 'Tifway 419' bermudagrass, 2008 |
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| Section: | Turfgrass
Other records with the "Turfgrass" Section
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| Source: | PDMR: Plant Disease Management Reports. Vol. 3, 2009, p. T024. |
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| Publishing Information: | St. Paul, MN: American Phytopathological Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Comparisons; Cynodon; Cynodon dactylon; Cynodon dactylon x Cynodon transvaalensis; DMI fungicides; Fungicide evaluation; Phytotoxicity; Trinexapac-ethyl; Turfgrass quality
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| Cultivar Names: | U-3; Riviera; Tifway 419 |
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| Trade Names: | Primo Maxx |
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| Abstract/Contents: | "Plots were established at the Turfgrass Research Center located in Stillwater, OK. Plots were 1.5 ft wide and 8 ft long with 2 ft alleys between plots. The turfgrass swards were mature stands of 'U-3', 'Riviera', and 'Tifway 419'bermudagrass cultivars planted on a Norge loam soil. For each cultivar, the experimental design was a split-block, where Primo MAXX (growth regulator) treatments were whole plots applied in strips across each replicated block and sub-plots were fungicide treatments. There were four replicates for each cultivar trial. Mowing height was 3 in. Recommended maintenance practices were followed throughout the growing season. Fungicides were applied with a CO2 pressurized wheelbarrow sprayer equipped with TX8008 flat fan nozzles and calibrated to deliver 87 GPA or 2 gal/1000 ft2. Primo MAXX 1EC was applied at 0.38 fl oz/1000 ft2 using the same spraying apparatus. Fungicides and growth regulator treatments were first applied on 3 Jul and applied at 14-day intervals. Ratings of phytotoxicity (scale of 0 - 10 where 0 = no change, 1 = slight change in turfgrass appearance, 5 = distinct change in turfgrass appearance, 10 = very abnormal turfgrass) and turfgrass quality (scale of 1 - 9 scale where 1 = no turf present, 5 = unacceptable turfgrass, 7 = acceptable turf, 9 = dense, dark color, thick stand of turfgrass) were taken on 7 Aug during a period of severe heat stress. Turf phytotoxicity and quality data were analyzed using ANOVA (α = 0.05) for each cultivar, separately. Multiple comparisons of means were performed using Fisher's test of protected least significant difference (α = 0.05). The bermudagrasses selected for this study represent "common" ('U-3'), "vegetative hybrid" ('Tifway 419'), and "seeded hybrid" ('Riviera') bermudagrasses that are commonly grown throughout the southern United States. The application of Primo MAXX 1EC (whole plot effect) on the cultivar 'U-3' significantly (P = 0.02) increased the level of phytotoxicity (1.81) and significantly (P = 0.02) reduced quality (8.10) versus not applying growth regulator (phytotoxicity = 0.97; quality = 8.49). The same was true for 'Riviera' where applications of growth regulator significantly (P = 0.01) increased the level of phytotoxicity (2.22) and significantly (P =0.001) reduced quality (7.86) versus not applying growth regulator (phytotoxicity = 0.92; quality = 8.40). No effects of growth regulator application were identified for the cultivar 'Tifway 419'. An effect of fungicides (sub-plot effect) on turfgrass phytotoxicity and quality was only observed for the cultivar 'U-3'. 'U-3' bermudagrass treated with Banner MAXX 1.24 MEC, Bayleton 50 WG, and Eagle 40 WP had higher levels of phytotoxicity and lower turfgrass quality than non-fungicide treated control plots. Plots treated with Trinity 1.67 SC at 1.5 fl oz/1000ft2 exhibited higher levels of phytotoxicity and lower turfgrass quality than non-fungicide treated check plots, but was not significantly different from plots treated with Eagle 40WP. Plots treated with all other rates of the fungicide Trinity 1.67 SC exhibited levels of phytotoxicity and turfgrass quality that were comparable to non-fungicide treated control plots. No interactions of growth regulator and fungicide application were significant." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is as abstract and tables only!
Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Smith, D. L., and N. R. Walker. 2009. Effects of DMI fungicides and Primo MAXX on 'U-3', 'Riviera', and 'Tifway 419' bermudagrass, 2008. PDMR: Plant Dis. Manage. Rep. 3:p. T024. |
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| Web URL(s):
http://www.plantmanagementnetwork.org/pub/trial/pdmr/volume3/abstracts/t24.asp
Last checked: 08/31/2009
Notes: Report summary
https://www.plantmanagementnetwork.org/pub/trial/pdmr/reports/2009/T024.pdf
Last checked: 11/11/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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