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Web URL(s): | http://apsjournals.apsnet.org/doi/pdf/10.1094/PHYTO.2008.98.6.S9#page=72 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): | Kern, J.;
Uddin, W.;
Wong, F. |
Author Affiliation: | Kern and Uddin: The Pennsylvania State University; Wong: University of CaliforniaRiverside |
Title: | The effects of temperature and leaf wetness duration on the development of gray leaf spot in kikuyugrass turf |
Source: | Phytopathology. Vol. 98, No. 6, June Supplement 2008, p. S80. |
Publishing Information: | St. Paul, MN: American Phytopathological Society |
# of Pages: | 1 |
Keywords: | TIC Keywords: Gray leaf spot; Pennisetum clandestinum; Disease severity; Leaf wetness duration; Temperatures
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Abstract/Contents: | "Gray leaf spot, caused by Magnaporthe oryzae, is a newly emerging disease of kikuyugrass turf. Effects of environmental factors on development of gray leaf spot in kikuyugrass turf are virtually unknown. This study investigated the effects of temperature and leaf wetness duration on the development of gray leaf spot in kikuyugrass. The experiment was a splitplot design where temperature (20, 24, 28, and 32°C) was the mainplot factor and leaf wetness duration (LWD; 3 to 24 h at 3 h intervals) was subplot factor. There were six replications of treatments. Sixweekold kikuyugrass plants were inoculated with M. oryzae (5 x 104 conidia/ml water), and the plants were placed in four controlled environment chambers at each temperature. The experiment was conducted four times with each chamber exposed to a different temperature treatment in each run of the experiment. Development of gray leaf spot was monitored daily and incubation periods were recorded. Disease incidence and severity were assessed seven days after inoculation. There were significant affects of temperature and LWD on disease incidence and severity. Additionally, there were significant interactions between temperature and LWD. Gray leaf spot incidence and severity increased with increasing LWD at all four temperatures tested, and they were greatest at 24°C and 24 h LWD. Results from this study will be used in development of a predictive model for gray leaf spot of kikuyugrass turf." |
Language: | English |
References: | 0 |
Note: | This item is an abstract only! |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Kern, J., W. Uddin, and F. Wong. 2008. The effects of temperature and leaf wetness duration on the development of gray leaf spot in kikuyugrass turf. Phytopathology. 98(6):p. S80. |
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| Web URL(s): http://apsjournals.apsnet.org/doi/pdf/10.1094/PHYTO.2008.98.6.S9#page=72 Last checked: 10/20/2015 Requires: PDF Reader Notes: Item is within a single large file |
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