Effect of core cultivation, fertility, and plant growth regulators on recovery of voided creeping bentgrass greens canopies following annual bluegrass control via methiozolin
|Venner, Katelyn A.
|Peppers, John M.
|Askew, Shawn D.
|This article was originally published in Weed Technology. The version of record is available at: https://doi.org/10.1017/wet.2023.19. © The Author(s), 2023. Published by Cambridge University Press on behalf of the Weed Science Society of America.
|Methiozolin is commonly used for the safe and selective removal of annual bluegrass from creeping bentgrass golf greens. Studies were conducted in 2013 and 2014 with the objective of assessing fertility programs consisting of synthetic fertilizers and biostimulants, with and without the plant growth regulator trinexapac-ethyl, to aid putting green canopy recovery following annual bluegrass removal via methiozolin. Additional studies were conducted to compare recovery of creeping bentgrass following an aggressive core aerification event with fertility programs with and without methiozolin. In all cases, the addition of 7 kg ha−1 of N-P-K from fertilizer or biostimulant biweekly to greens increased turfgrass recovery time by 1 to 3 wk compared to a standard green’s fertility program alone. Creeping bentgrass treated with biostimulants recovered equivalent to or quicker than creeping bentgrass treated with synthetic fertilizer (SF) in all cases. In the presence of methiozolin treatments, trinexapac-ethyl reduced time to 90% recovery (T90) by 0.25 to 0.5 wk at two locations, and increased T90 recovery time by 0.1 wk at one location. Otherwise, plots treated with SF plus trinexapac-ethyl were equivalent to plots treated with SF only. Methiozolin slowed turfgrass recovery time at one location where severe drought stress occurred but not at the other location that did not experience drought stress. These results suggest that turf managers should increase fertilizer treatments but will not need to discontinue trinexapac-ethyl use to maximize creeping bentgrass recovery following annual bluegrass control with methiozolin. These data also suggest that methiozolin has the potential to negatively affect creeping bentgrass recovery when drought stress is experienced.
|We thank Mr. Jason Ratcliff, superintendent of the Virginia Tech Golf Course, for allowing research to be conducted on putting greens under his care. Although this research received no specific grant from any funding agency, commercial or not-for-profit sectors, Kate Venner’s graduate stipend was partially funded by Moghu Research Center. This study was designed in collaboration with co-author Dr. Suk Jin Koo who is Chief Executive Officer of Moghu Research Center. No further conflicts of interest are declared. Biostimulant products were graciously provided by Chris Appel of Floratine.
|Venner, Katelyn A., Erik Ervin, Suk-Jin Koo, John M. Peppers, and Shawn D. Askew. “Effect of Core Cultivation, Fertility, and Plant Growth Regulators on Recovery of Voided Creeping Bentgrass Greens Canopies Following Annual Bluegrass Control via Methiozolin.” Weed Technology 37, no. 2 (2023): 185–91. doi:10.1017/wet.2023.19.
|Poa annua L. POAAN
|Agrostis stolonifera L. AGSST
|Effect of core cultivation, fertility, and plant growth regulators on recovery of voided creeping bentgrass greens canopies following annual bluegrass control via methiozolin
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