Full TGIF Record # 278220
Item 1 of 1
Web URL(s):https://scisoc.confex.com/scisoc/2016am/webprogram/Paper102047.html
    Last checked: 11/22/2016
Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):Townsend, Ron; Koch, Paul
Author Affiliation:Plant Pathology, University of Wisconsin-Madison, Madison, WI
Title:The impact nitrogen application rates, nitrogen source and ambient pH have on Sclerotinia homoeocarpa on Agrostis stolonifera putting greens
Section:Turfgrass management: Diseases/insects
Other records with the "Turfgrass management: Diseases/insects" Section

C05 turfgrass science
Other records with the "C05 turfgrass science" Section
Meeting Info.:Phoenix, Arizona: November 6-9, 2016
Source:ASA, CSSA and SSSA International Annual Meetings. 2016, p. 102047.
Publishing Information:[Milwaukee, Wisconsin]: [American Society of Agronomy and the Entomological Society of America]
# of Pages:1
Keywords:TIC Keywords: Agrostis stolonifera; Application rates; Disease severity; Dollar spot; Fertilizer evaluation; Golf greens; Nitrogen deficiency; Nitrogen fertilizers; Sclerotinia homoeocarpa; pH
Abstract/Contents:"Dollar spot is a disease which infects many turfgrass species and has been associated with nitrogen deficient turfgrass. The pathogen Sclerotinia homoeocarpa which causes the disease, is controlled predominately by applying fungicides. Fungicides controlling dollar spot have been questioned as to the potential risk they may pose to the environment. It is known that pH plays a role in oxalic acid production by the pathogen and potentially affecting the pH of the foliar tissue and soil by using different nitrogen sources which could reduce dollar spot severity. The objective of this trial was to evaluate the impact of nitrogen source and application rate on dollar spot severity. The field trial was run over a two year period on two putting greens, located in Verona, Wisconsin and Glenview, Illinois. Field parameters evaluated included percent infected area per plot, number of infection sites per plot, foliar pH, soil pH, turfgrass quality and percent foliar tissue nitrogen content. Lab parameters evaluated included oxalic acid production, fungal biomass accumulation, potato dextrose broth (PDB) pH change, and different initial ambient pH. The results from the field trial showed that only nitrogen application rates effected dollar spot severity while nitrogen source did not. Results from the lab trial showed that oxalic acid was produced in significantly greater quantities (P=0.05) when initial pH was neutral compared to acidic. We conclude that nitrogen source does not play a role in dollar spot severity, and when nitrogen application rates increase there is a reduction in dollar spot severity. We conclude that initial ambient pH determines the amount of oxalic acid produced by the pathogen and when more oxalic acid is produced by the pathogen ambient pH becomes more acidic."
Language:English
References:0
Note:This item is an abstract only!
"243-4"
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Townsend, R., and P. Koch. 2016. The impact nitrogen application rates, nitrogen source and ambient pH have on Sclerotinia homoeocarpa on Agrostis stolonifera putting greens. Agron. Abr. p. 102047.
Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=278220
If there are problems with this record, send us feedback about record 278220.
Choices for finding the above item:
Web URL(s):
https://scisoc.confex.com/scisoc/2016am/webprogram/Paper102047.html
    Last checked: 11/22/2016
Find from within TIC:
   Digitally in TIC by record number.
Request through your local library's inter-library loan service (bring or send a copy of this TGIF record)