Full TGIF Record # 136682
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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
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Publication Type:
i
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
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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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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