Full TGIF Record # 317072
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Web URL(s):https://scisoc.confex.com/scisoc/2021am/meetingapp.cgi/Paper/134068
    Last checked: 03/28/2022
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Hutchens, Wendell J.; Goatley, James M.; Kerns, James P.; Nita, Mizuho; Straw, Chase M.; Sullivan, Dana; Henderson, Caleb A.; McCall, David S.
Author Affiliation:Hutchens, Goatley, Henderson, and McCall: School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, VA; Kerns: Plant Pathology, North Carolina State University, Raleigh, NC; Nita: School of Plant and Environmental Sciences, Virginia Tech, Winchester, VA; Straw: Soil and Crop Science, Texas A&M University, College Station, TX; Sullivan: TurfScout, LLC., Greensboro, NC
Title:Environmental and edaphic factors that influence spring dead spot epidemics
Section:Turfgrass pest management oral II: Diseases (includes student competition)
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C05 turfgrass science
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Meeting Info.:Salt Lake City, Utah: November 7-10, 2021
Source:ASA, CSSA and SSSA International Annual Meetings. 2021, p. 134068.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Abstract/Contents:"Spring dead spot (Ophiosphaerella spp.) is a soilborne disease of warm-season turfgrasses in areas where winter dormancy occurs. The environmental and edaphic factors that influence where spring dead spot epidemics occur are not well understood. A study was conducted in the spring of 2020 and repeated during the spring of 2021 on four 'TifSport' hybrid bermudagrass (Cynodon dactylon (L.) Pers. x transvaalensis Burtt Davy) golf course fairways expressing spring dead spot symptoms in Cape Charles, Virginia. Spring dead spot within each fairway was mapped using Pix4D software from aerial imagery collected in the spring of 2019 with a 20 MP CMOS 4k true color sensor mounted on a DJI Phantom 4 Pro drone. Three disease intensity zones were designated from the maps (low, moderate, high) based on the density of spring dead spot patches in an area. Percent disease, soil samples, compaction, thatch, and organic matter measurements were taken from ten plots within each disease intensity zone from each of the four fairways (n=120). Multivariate pairwise correlation analysis (P = 0.1) was conducted to determine which edaphic and environmental factors most influenced the spring dead spot epidemic. An increase in thatch depth generally resulted in more spring dead spot suggesting that high thatch levels could be a valid predictor of spring dead spot epidemics. Moreover, on one fairway in 2021, reduced soil moisture was significantly correlated to higher percent spring dead spot, which suggests that lower soil moisture could predispose the plant to more spring dead spot damage. These results will help turfgrass managers make more informed decisions about their highest disease pressure areas, and it will allow them to implement targeted chemical and cultural practices to manage spring dead spot more effectively."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hutchens, W. J., J. M. Goatley, J. P. Kerns, M. Nita, C. M. Straw, D. Sullivan, et al. 2021. Environmental and edaphic factors that influence spring dead spot epidemics. Agron. Abr. p. 134068.
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