Full TGIF Record # 37510
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Author(s):Yuen, Gary Y.; Giesler, Loren J.; Horst, Garald L.
Author Affiliation:Department of Plant Pathology and Department of Horticulture, Univesity of Nebraska, Lincoln, NE 68583-0722
Title:Influence of canopy structure on tall fescue cultivar susceptibility to brown patch disease
Source:Turfgrass Research Report for 1994 [Nebraska]. 1994, p. 75-79.
# of Pages:5
Publishing Information:[Lincoln, NE]: University of Nebraska
Keywords:TIC Keywords: Canopy; Leaf area; Brown patch; Festuca arundinacea; Susceptibility; Cultivar evaluation; Rhizoctonia solani; Necrosis; Inoculation; Disease development; Verdure; Density
Cultivar Names:Kentucky 31; Trailblazer
Abstract/Contents:"Tall fescue (Festuca aurundinacea) cultivars were evaluated under growth chamber and field conditions for susceptibility to brown patch disease caused by Rhizoctonia solani. Percentage foliar necrosis varied among cultivars in growth chamber experiments. Kentucky-31 was the least susceptible cultivar (cv.), sustanining <25% necrosis 6 days after inoculation with the pathogen. Severity of necrosis in other cvs under the same conditions was as high as 88%. Brown patch disease development in the field was lowest in cv. Kentucky-31 in 1991...was 34%, compared with 60% in the most susceptible cv., Trailblazer. Similarly in 1992, cvs Kentucky-31 and Trailblazer had the lowest and highest levels, respectively, of brown patch lesion development. Leaf blade density and verdure in the field varied among the cvs. Blade density and verdure correlated (r=0.75 and 0.65, respectively; P <0.05) with the extent of lesions measured in 1992, hut [but] were not related to mean blight severity measured in 1991. Field disease levels observed in both years had low correlations (r =0.59; P=0.10) with levels of necrosis measured in the growth chamber."
Note:See also reprint, R=44210
Geographic Terms:Nebraska
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Yuen, G. Y., L. J. Giesler, and G. L. Horst. 1994. Influence of canopy structure on tall fescue cultivar susceptibility to brown patch disease. Turfgrass Res. Rep. Nebr. p. 75-79.
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