Full TGIF Record # 309539
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Web URL(s):https://scisoc.confex.com/scisoc/2019am/meetingapp.cgi/Paper/118416
    Last checked: 12/02/2019
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Dant, Lukas; Martin, S. Bruce; McCarty, Lambert B.; Kerns, James P.
Author Affiliation:Dant: Clemson University , Simpsonville, SC; Martin: Department of Plant and Environmental Sciences, Pee Dee Research & Education Center, Clemson University, Florence, SC; McCarty: Department of Plant and Environmental Sciences, Clemson University, Clemson, SC; Kerns: Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC
Title:Effect of nitrogen source and rate on Rhizoctonia leaf and sheath spot disease development in interspecific hybrid bermudagrass
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. 118416.
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: Ammonium sulfate; Application rates; Cynodon dactylon x Cynodon transvaalensis; Disease development; Dwarf bermudagrasses; Hybrid bermudagrasses; Leaf and sheath spot; Nitrogen sources; Urea
Cultivar Names:Mini Verde; TifEagle
Abstract/Contents:"The disease Rhizoctonia leaf and sheath spot (RLSS), purportedly caused by Rhizoctonia zeae Voorhees, is problematic in interspecific hybrid bermduagrass (Cynodon dactylon (L.) Pers. X C. transvaalensis (Burtt-Davy). New cultivars of interspecific hybrid bermduagrass, also known as ultradwarf bermduagrass (UDBG), have growth characteristics that produce an ideal putting surface, but these cultivars appear more susceptible to RLSS compared to older cultivars. RLSS symptoms typically are most severe in late-summer and appear as frog-eye patches 4 to 18 cm in diameter. RLSS is often called "mini-ring" because of the small brown rings that are produced when UDBG is infected. The effect of nitrogen source and application rate on RLSS symptom develop was investigated in 2016 and 2017 by employing a factorial treatment arrangement. Urea and ammonium sulfate were each applied weekly during the growing season to supply nitrogen at rates of 0.49, 0.98, and 1.46 g/m2. A treatment in which UDBG received no nitrogen was included as a control. The study was conducted on UDBG cultivars 'TifEagle' and 'MiniVerde', both maintained as research putting greens at the Clemson University Pee Dee Research and Education Center in Florence, SC. Nitrogen treatments were applied to the same plots in both years. RLSS symptoms were assessed by dividing each plot into eight subsections and visually estimating the percent of each subsection affected by RLSS. In both cultivars and in both years, RLSS symptom severity increased as the rate of ammonium sulfate increased. Conversely, increasing application rates of urea either had no impact on RLSS severity or decreased symptom severity in 2016 and 2017. These studies suggest that utilizing urea as a nitrogen source, rather than ammonium sulfate, can be an effective strategy to manage RLSS in UDBG."
See Also:Updated version appears in International Turfgrass Society Research Journal, 14(1) June 2022, p. 940-950, R=321487. R=321487
Note:This item is an abstract only!
"Poster #1621"
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Dant, L., S. B. Martin, L. B. McCarty, and J. P. Kerns. 2019. Effect of nitrogen source and rate on Rhizoctonia leaf and sheath spot disease development in interspecific hybrid bermudagrass. Agron. Abr. p. 118416.
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