Full TGIF Record # 309565
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Web URL(s):https://scisoc.confex.com/scisoc/2019am/meetingapp.cgi/Paper/122330
    Last checked: 12/03/2019
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Freund, Daniel; Gannon, Travis W.; Kerns, James P.
Author Affiliation:Freund: North Carolina State University, Raleigh, NC; Gannon: Crop and Soil Science, North Carolina State University, Raleigh, NC; Kerns: Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC
Title:Influence of mowing timing on azoxystrobin fate and implications for brown patch management
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. 122330.
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: Azoxystrobin; Disease control; Festuca arundinacea; Mowing; Mowing timing; Pesticide fate; Pesticide residues; Brown patch
Cultivar Names:Triple Threat
Abstract/Contents:"Previous research suggests that mowing practices following azoxystrobin application alter pest control and residue fate. Field research was initiated June 14, 2018 in Raleigh, NC and repeated in time to assess the effect of initial mowing timing on azoxystrobin-brown patch (Rhizoctonia spp.) efficacy and residue persistence in tall fescue (Lolium arundinaceum (Schreb.) Darbysh 'Triple Threat'). At trial initiation, azoxystrobin was applied at the maximum single application rate (0.61 kg ai ha-1) to unique tall fescue plots with small-plot, CO2-propelled equipment calibrated to deliver the lowest labeled carrier volume (812 L ha-1). Plots were then mown (9.5-cm) at 0, 1, 2, 3, 7 or 14 days after treatment (DAT) and visually rated weekly for brown patch through 56 DAT. Regardless of mowing timing, clippings were mulched and returned to the canopy, and mown every 7 days following the first 7 DAT. Concurrently, soil cores (92 cm2) were collected at 7, 14 and 21 DAT and then segmented into remaining aboveground vegetation and soil (0.0 to 2.5-cm depth) for subsequent residue analyses. Azoxystrobin residue in soil and vegetation was quantified via HPLC-MS methodology at the North Carolina State University Pesticide and Trace Elements Laboratory. At 14 DAT sampling time, 0 DAT (immediate mowing) yielded a lower total recovery (21%) of applied azoxystrobin compared to mowing at 14 DAT (52%). When visually rated though 56 DAT, azoxystrobin provided excellent brown patch suppression (1.5 to 2.5%) regardless of mowing timing compared to 13% brown patch in nontreated plots. Data gathered from this research may allow turfgrass managers to extend azoxystrobin residual, which could be beneficial under increased disease pressure or may result in a reduction in overall fungicidal inputs."
Note:This item is an abstract only!
"Poster #1630"
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Freund, D., T. W. Gannon, and J. P. Kerns. 2019. Influence of mowing timing on azoxystrobin fate and implications for brown patch management. Agron. Abr. p. 122330.
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