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	Full TGIF Record # 309564 Item 1 of 1
Web URL(s):	https://scisoc.confex.com/scisoc/2019am/meetingapp.cgi/Paper/122309     Last checked: 12/03/2019     Requires: JavaScript https://archive.lib.msu.edu/tic/groot/article/2019jul.pdf     Last checked: 01/15/2020     Requires: PDF Reader     Notes: Item is within a single large file; The Grass Roots reprint; Direct download https://turf.rutgers.edu/wp-content/uploads/2023/03/symposium-2019.pdf#page=43     Last checked: 07/31/2023     Requires: PDF Reader     Notes: Item is within a single large file; Proceedings of the Twenty-Eighth Annual Rutgers Turfgrass Symposium reprint
Publication Type:	Report
Content Type:	Abstract or Summary only
Author(s):	Genova, Kyle M.; Clarke, Bruce B.; Murphy, James A.
Author Affiliation:	Department of Plant Biology, Rutgers University, New Brunswick, NJ
Title:	Anthracnose response to potassium Under two nitrogen levels
Section:	C05 turfgrass science Other records with the "C05 turfgrass science" Section Turfgrass pest management poster: Diseases, insects, weeds (includes student competition) Other records with the "Turfgrass pest management poster: Diseases, insects, weeds (includes student competition)" Section
Meeting Info.:	San Antonio, Texas: November 10-13, 2019
Source:	ASA, CSSA and SSSA International Annual Meetings. 2019, p. 122309.
Publishing Information:	[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:	1
Keywords:	TIC Keywords: Anthracnose; Colletotrichum graminicola; Disease control; Disease severity; Fertilization rates; Nitrogen response; Poa annua turf; Potassium sulfate; Urea nitrogen solution
Abstract/Contents:	"Anthracnose (caused by Colletotrichum cereale Manns sensu lato Crouch, Clarke and Hillman) is a disease of annual bluegrass (ABG) [Poa annua L. f. reptans (Hausskn) T. Koyama] putting greens in the northeast region of the United States. A 2-yr field study assessed the response of anthracnose to potassium and nitrogen applications on ABG turf maintained at 2.8-mm in North Brunswick, NJ. A randomized complete block design with four replications was used to evaluate four potassium rates (0, 4, 8 and 16 kg K2O ha-1) applied as a potassium sulfate solution every two weeks under two levels of N. Nitrogen was applied at 4.9 kg ha-1 as a urea solution every 28 days (29 kg N ha-1 yr-1) or seven days (117 kg N ha-1 yr-1) for a total of 24 weeks beginning 28 and 13 April in 2016 and 2017, respectively. Increasing both potassium and nitrogen fertility (main effects) reduced disease severity measured as area under the disease progress curve in 2016 and 2017. The N x K interaction was significant for three ratings dates in 2016. Two rating dates during disease onset (June) indicated an effect size difference when all K fertilization rates were more effective at reducing disease compared to no K under lower N fertility than greater N. However, at the end of the disease outbreak (16 August 2016), K fertilization was not effective at reducing anthracnose under lower N, whereas K fertilization reduced disease under greater N rate. During 2016 and 2017, plots treated with K (all rates pooled across both N levels) had a 55 to 59% and 49 to 54% reduction in disease severity, respectively, compared to plots that received no potassium. Combining K fertilization with weekly N reduced anthracnose by 74 and 68% compared to no K in 2016 and 2017, respectively."
Language:	English
References:	0
See Also:	See also related article "Reducing anthracnose with potassium and nitrogen" Golf Course Management, 88(11) November 2020, p. 71, R=312074. R=312074
Note:	Reprint appears in Proceedings of the Twenty-Eighth Annual Rutgers Turfgrass Symposium, January 11 2019, p. 43 Reprint appears in The Grass Roots, 48(4) July/August 2019, p. 33-34 This item is an abstract only! "181" "Poster #1629"
	ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Genova, K. M., B. B. Clarke, and J. A. Murphy. 2019. Anthracnose response to potassium Under two nitrogen levels. Agron. Abr. p. 122309.
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	Web URL(s): https://scisoc.confex.com/scisoc/2019am/meetingapp.cgi/Paper/122309     Last checked: 12/03/2019     Requires: JavaScript https://archive.lib.msu.edu/tic/groot/article/2019jul.pdf     Last checked: 01/15/2020     Requires: PDF Reader     Notes: Item is within a single large file; The Grass Roots reprint; Direct download https://turf.rutgers.edu/wp-content/uploads/2023/03/symposium-2019.pdf#page=43     Last checked: 07/31/2023     Requires: PDF Reader     Notes: Item is within a single large file; Proceedings of the Twenty-Eighth Annual Rutgers Turfgrass Symposium reprint
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