Full TGIF Record # 313111
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Web URL(s):http://www.turfgrasssociety.eu/
    Last checked: 01/21/2021
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Publication Type:
Author(s):Aamlid, Trygve S.; van Leeuwen, Geo J. L.
Author Affiliation:Aamlid: Ph.D. and Research Leader, Turfgrass Science Bioforsk - Norwegian Institute for Agricultural and Environmental Research, Norway; van Leeuwen: MSc and Research Scientist, Turfgrass Science Bioforsk - Norwegian Institute for Agricultural and Environmental Research, Norway
Title:Optimal application intervals for the plant growth regulator Trinexapac-ethyl
Section:Turfgrass growing factors, impact for the environment
Other records with the "Turfgrass growing factors, impact for the environment" Section
Meeting Info.:July 6-9
Source:5th European Turfgrass Society Conference Proceedings. July 2014, p. 81-82.
# of Pages:2
Publishing Information:Faro, Portugal: European Turfgrass Society
Abstract/Contents:"The plant growth regulator Primo MAXX (PM, trinexapac-ethyl) is approved for use on turf in Sweden and Iceland, and applications for registration have also been filed in Finland and Norway. PM inhibits the conversion of GA20 to GA1, i.e. the last step in plant biosynthesis of the plant hormone gibberellic acid (ADAMS et al., 1992). Because PM is not persistent in plant tissue, it must be reapplied at regular intervals to have a consistent effect on cell elongation and turfgrass clipping yields. Application intervals of 1-2 weeks on greens and 2-3 weeks on fairways were recommended based on trials on Nordic golf courses (AAMLID et al., 2009). If application intervals become too long, turf treated with PM will rebound, i.e. grow faster than the untreated turf after PM is no longer suppressing growth (LICKFELDT et al., 2001; BRANHAM and BEASLEY, 2007). Research in Wisconsin, USA, has shown that the duration of growth suppression depends on temperature, and that optimal application interval in the northern US (40-49 ° N) is 200 Growing Degrees Days (GDD) with a base temperature 0 ° C (KREUSER and SOLDAT, 2012). The Nordic countries are located at 56-71 ° N and the maximum daylength at midsummer ranges from 18 to 24 h. For grasses native to this region, it is well documented that the long summer days have a strong impact on leaf elongation and dry matter production, especially at cool temperatures, and this effect may well be mediated by GA1 as discussed by (HAY, 1990). It can therefore be hypothesized that the rebound effect will occur faster at higher latitudes than at low latitudes, although it remains to be established how the combination of low summer temperatures and long days will influence turf metabolism of trinexapac-ethyl. Thus, the objective of this research was to study the effect of increasing temperature and daylength on the duration of growth suppression, expressed in GDD, after application of PM."
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
2014. Optimal application intervals for the plant growth regulator Trinexapac-ethyl. Eur. Turfgrass Soc. Conf. Proc. p. 81-82.
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    Last checked: 01/21/2021
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