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| Web URL(s): | https://dl.sciencesocieties.org/publications/aj/pdfs/81/5/AJ0810050749
Last checked: 12/14/2016
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Access conditions: Item is within a limited-access website |
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| Publication Type:
| Refereed |
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| Author(s): | Branham, B. E.;
Danneberger, T. K. |
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| Author Affiliation: | Dep. Crop and Soil Sci., MSU, Dep. of Agronomy, Ohio State Univ. |
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| Title: | Growth Suppression of `Kenblue' Kentucky Bluegrass Using Plant Growth Regulators and Degree Day Application Timing |
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| Source: | Agronomy Journal. Vol. 81, No. 5, September/October 1989, p. 749-752. |
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| Publishing Information: | Washington: American Society of Agronomy |
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| # of Pages: | 4 |
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| Keywords: | TIC Keywords: Poa pratensis; Growth regulators; Mefluidide; Clippings; Amidochlor
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| Abstract/Contents: | "Plant growth regulator (PGR) applications for seedhead and vegetative growth suppression have given inconsistent results from year to year when application timing is based on calendar days. Application timing based on growing degree days (GDD) should provide uniform and consistent results over time. These field studies were conducted to determine the window of application, based on GDD, for seedhead and vegetative growth suppression of Kentucky bluegrass. Mefluidide (N-[2, 4-dimethyl -5- [[(trifluoromethyl) -sulfonyl] amino] phenyl] acetamide) at 0.28 kg ha-1 and amidochlor (N- [(acetylamino) methyl] -2- chloro -N- (2, 6-diethylphenyl) acetamide) at 2.8 kg ha-1 were applied to a uniform stand of Kentucky bluegrass [Poa pratensis (L.) `Kenblue'] at 25, 50, 75, 100, 125, and 150 GDD. Trials were conducted at East Lansing, MI in 1985 and 1986, and Columbus, OH in 1986. Soil type at East Lansing was an Owosso Marlette sandy loam complex (fine loamy, mixed, mesic Typic Glossoboric Hapludalf). Soil at Columbus was a Brookston silty clay loam (fine loamy, mixed, mesic Typic Agiaquoll). Application of PGR betwween 25 and 125 GDD provided excellent ( > 86%) seedhead control. Mefluidide and amidochlor applications at 150 GDD gave 31 and 24% seedhead control, respectively, indicating that seedhead control was lost with this application timing. Clipping weights at East Lansing varied between years with only the 150 GDD application in 1985 and the 75 GDD application in 1986 differing significantly from the other application timings. However, the 75 GDD treatment in 1986 had reduced PGR activity because of rainfall 5 h after application. Application timing of PGR appeared to have no significant effect on the timed PGR applications are a valid technique for seedhead control in Kentucky bluegrass." |
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| Language: | English |
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| References: | Unknown |
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| See Also: | Other items relating to: PGRS |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Branham, B. E., and T. K. Danneberger. 1989. Growth Suppression of `Kenblue' Kentucky Bluegrass Using Plant Growth Regulators and Degree Day Application Timing. Agron. J. 81(5):p. 749-752. |
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| Web URL(s):
https://dl.sciencesocieties.org/publications/aj/pdfs/81/5/AJ0810050749
Last checked: 12/14/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: S 22 .A45 |
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