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Web URL(s): | http://apsjournals.apsnet.org/doi/pdf/10.1094/PHYTO.2005.95.6.S1#page=63 Last checked: 10/20/2015 Requires: PDF Reader Notes: Item is within a single large file |
Publication Type:
| Report |
Content Type: | Abstract or Summary only |
Author(s): | Ma, B.;
Uddin, W. |
Author Affiliation: | Pennsylvania State University |
Title: | Sensitivity of azoxystrobin-resistant Magnaporthe grisea causing gray leaf spot of perennial ryegrass turf to various classes of fungicides |
Section: | APS Abstracts Submitted for Presentation at the 2005 APS Annual Meeting Other records with the "APS Abstracts Submitted for Presentation at the 2005 APS Annual Meeting" Section
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Source: | Phytopathology. Vol. 95, No. 6, June Supplement 2005, p. S63. |
Publishing Information: | St. Paul, MN: American Phytopathological Society |
# of Pages: | 1 |
Keywords: | TIC Keywords: Pyricularia grisea; Gray leaf spot; Lolium perenne; Azoxystrobin; Fungicides; Fungicide resistance; Disease control
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Abstract/Contents: | "Preventive and curative treatments of fungicide were examined to determine the efficacy of five classes of fungicides, azoxystrobin (A), chlorothalonil (C), mancozeb (M), propiconazole (P), thiophanate-methyl (T), and six half-rate mixtures 1/2AC, 1/2AM, 1/2 PC, 1/2PM, 1/2TC, 1/2TM, for control of gray leaf spot caused by populations of M. grisea with and without azoxystrobin resistant members. In preventive applications, all treatments provided excellent control when the plants were inoculated with an azoxystrobin sensitive isolate. No significant differences in disease incidence (DI) and disease severity (DS) were observed between A, P and 1/2AC treatments and control when the plants were inoculated with a mixture of sensitive and resistant isolates (98:2). In curative treatments, A, P, T, 1/2AC, 1/2TC, and 1/2TM resulted in significantly lower DI and DS than control when the plants were inoculated with the sensitive isolate. Only P, T, and 1/2TC treatments significantly reduced DI and DS when the grass was inoculated with the resistant isolate. Results of this study suggest that gray leaf spot, caused by azoxystrobin-resistant isolates, may be effectively managed by preventive fungicide program that include at least one of the C, M, T, 1/2PC, 1/2PM, 1/2TC, and 1/2TM treatments and curative program that include at least one of the P, T, and 1/2TC treatments." |
Language: | English |
References: | 0 |
Note: | This item is an abstract only! |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Ma, B., and W. Uddin. 2005. Sensitivity of azoxystrobin-resistant Magnaporthe grisea causing gray leaf spot of perennial ryegrass turf to various classes of fungicides. Phytopathology. 95(6):p. S63. |
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| Web URL(s): http://apsjournals.apsnet.org/doi/pdf/10.1094/PHYTO.2005.95.6.S1#page=63 Last checked: 10/20/2015 Requires: PDF Reader Notes: Item is within a single large file |
| MSU catalog number: SB 599 .P48 |
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