Full TGIF Record # 287757
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Web URL(s):https://dl.sciencesocieties.org/publications/its/articles/13/1/153
    Last checked: 10/11/2019
    Access conditions: Item is within a limited-access website
Publication Type:
Author(s):Lee, David J.; Tredway, Lane P.; Shew, H. David; Peacock, Charles H.
Author Affiliation:Lee: Hope Valley Country Club, Durham, NC; Tredway: Syngenta Corporation, Raleigh, NC; Shew: Professor of Plant Pathology, Dep. of Entomology and Plant Pathology, NC State Univ., Raleigh, NC; Peacock: Dep. of Crop and Soil Sciences, NC State Univ., Raleigh, NC
Title:Effects of phosphorous acid compounds on the incidence of Rhizoctonia solani in tall fescue and creeping bentgrass
Section:Diseases (plant pathology)
Other records with the "Diseases (plant pathology)" Section
Meeting Info.:New Brunswick, New Jersey: July 16-21, 2017
Source:International Turfgrass Society Research Journal. Vol. 13, No. 1, November 2017, p. 153-159.
# of Pages:7
Publishing Information:s.l.: International Turfgrass Society
Related Web URL:https://dl.sciencesocieties.org/publications/its/abstracts/13/1/153
    Last checked: 01/19/2018
    Notes: Abstract only
Keywords:TIC Keywords: Agrostis stolonifera; Disease incidence; Festuca arundinacea; Fungicide efficacy; Fungicide evaluation; In vitro; In vivo; Phosphite salts; Pythium aphanidermatum; Rhizoctonia solani; Rhizoctonia zeae
Abstract/Contents:"Phosphorous acid-containing compounds have been shown to be effective in controlling certain fungal pathogens. The objective of this study was to evaluate the effectiveness of the active ingredient of phosphorous acid (phosphite) in vitro and in vivo. One isolate each of Rhizoctonia solani AG 1, R. solani AG 2-2IIIB, Rhizoctonia zeae, and Pythium aphanidermatum were obtained from turfgrasses and assayed for sensitivity to phosphorous acid and the fungicides fosetyl-Al, azoxystrobin, and azoxystrobin amended with salicylhydroxamic acid (SHAM). Six concentrations of each compound (0.01-10 mg L-1) were established in 9-cm diameter Petri dishes. Radial growth of the colonies on the amended agar was measured to determine the relative growth of colonies compared with the growth of the colonies on unamended medium. Parallel greenhouse and field studies were initiated to determine the effects of phosphorous acid on disease incidence and overall turf quality. Mean 50% effective concentrations were observed for all four pathogens with the azoxystrobin amended with SHAM treatment. Effective concentrations for the 2-2IIIB, AG1, P. aphanidermatum, and R. zeae were 1.27, 0.04, 0.012, and 0.145 mg L-1, respectively. Azoxystrobin alone did not reduce colony growth by 50% in the 2-2IIIB and R. zeae isolate. Greenhouse and field studies showed differences (p < 0.05) between two phosphorous acid rates, turf quality, and disease incidence of R. solani in tall fescue (Festuca arundinacea Schreb.) and creeping bentgrass (Agrostis stolonifera L.) turf and the control. However, disease incidence was at an unacceptable level in the phosphorous acid treatments. Phosphorous acid applications did increase the elemental phosphorus composition of shoot tissue."
See Also:See also related article "Effects of phosphorous acid compounds on casual agent of brown patch" Golf Course Management, 85(12) December 2017, p. 62-64, R=293871. R=293871
Note:TIC-hosted web link available 2 years after publication date.
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Lee, D. J., L. P. Tredway, H. D. Shew, and C. H. Peacock. 2017. Effects of phosphorous acid compounds on the incidence of Rhizoctonia solani in tall fescue and creeping bentgrass. Int. Turfgrass Soc. Res. J. 13(1):p. 153-159.
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DOI: 10.2134/itsrj2016.05.0396
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    Last checked: 10/11/2019
    Access conditions: Item is within a limited-access website
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MSU catalog number: b2394179
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