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| DOI: | 10.1094/PHYTO.2011.101.6.S1 |
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| Web URL(s): | http://apsjournals.apsnet.org/doi/pdf/10.1094/PHYTO.2011.101.6.S1#page=101
Last checked: 06/17/2016
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Li, Y. |
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| Author Affiliation: | Pennsylvannia State University, University Park, PA |
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| Title: | Effect of intermittent leaf wetness on incidence and severity of gray leaf spot of perennial ryegrass turf |
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| Section: | 2011 APS-IPPC Joint Meeting abstracts of presentations
Other records with the "2011 APS-IPPC Joint Meeting abstracts of presentations" Section
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| Meeting Info.: | Honolulu, Hawaii: August 6-10, 2011 |
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| Source: | Phytopathology. Vol. 101, No. 6s, June 2011, p. S101. |
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| Publishing Information: | Lancaster, Pennsylvania: The Society Intelligencer Printing Company for The American Phytopathological Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Disease incidence; Disease severity; Gray leaf spot; Leaf wetness duration; Lolium perenne; Pyricularia grisea
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| Abstract/Contents: | "Gray leaf spot, caused by Magnaporthe oryzae, is a devastating disease of perennial ryegrass (Lolium perenne) turf. Free leaf moisture is required for development of the disease. The objective of this study is to determine the effects of intermittent leaf wetness periods on incidence (% leaf blades symptomatic) and severity (Index 0-10; 0 = asymptomatic; 10 ≥ 90% leaf area necrotic) of gray leaf spot of perennial ryegrass turf. Six-weeks-old perennial ryegrass plants were inoculated with M. oryzae (8 × 104 conidia/ml H2O), exposed to various treatments with wet/dry periods, and maintained at 28°C to allow the disease to develop. Disease incidence and severity were assessed seven days after inoculation. The results showed that there were significant effects of wet/dry periods on disease incidence and severity. Highest disease incidence and severity were recorded on plants exposed to the longest leaf wetness period (18 h continuous leaf wetness). Increased interrupted dry periods significantly reduced gray leaf spot incidence and severity. Additionally, there were negative correlations between interrupted dry period and disease incidence or severity, and the relationships were best described by a quadratic model for disease incidence: YInc = -5.04X+0.10X2 + 91.08 and a linear model for disease severity: YSev = -0.27X + 9.05 (Inc = Incidence; Sev = Severity; X = dry period). Results of this study may be applied as a component of gray leaf spot disease management strategy in perennial ryegrass fairways in golf courses." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Li, Y. 2011. Effect of intermittent leaf wetness on incidence and severity of gray leaf spot of perennial ryegrass turf. Phytopathology. 101(6s):p. S101. |
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| DOI: 10.1094/PHYTO.2011.101.6.S1 |
| Web URL(s):
http://apsjournals.apsnet.org/doi/pdf/10.1094/PHYTO.2011.101.6.S1#page=101
Last checked: 06/17/2016
Requires: PDF Reader
Notes: Item is within a single large file |
| 
MSU catalog number: b2219736a |
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Digitally in TIC by file name: phytp2011junpres |
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