Full TGIF Record # 269907
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Web URL(s):https://archive.lib.msu.edu/tic/its/articles/1974sup24a.pdf
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Publication Type:
Content Type:Abstract or summary only
Author(s):Freeman, T. E.
Author Affiliation:University of Florida
Title:Influence of nitrogen fertilization on severity of pythium blight of ryegrass
Other records with the "Diseases" Section
Meeting Info.:Blacksburg, Virginia: June 19-21, 1973
Source:Abstracts of Papers Presented at the Second International Turfgrass Research Conference. 1973, p. 24.
Publishing Information:Blacksburg, Virginia: [International Turfgrass Society]
# of Pages:1
Keywords:TIC Keywords: Disease incidence; Disease severity; Fertilizer evaluation; Lolium multiflorum; Nitrogen fertilization; Pythium aphanidermatum
Abstract/Contents:"Pythium blight, incited by Pythium apbanidermatum, is the most serious disease that affects annual ryegrass (Lolium multiflorum) used for overseeding purposes in the Southern United States. Field observations over a number of years had suggested a possible relationship between N fertilization and incidence and severity of this disease. Grass fertilized with either organic sources of N or low levels of inorganic sources was damaged more frequently and more severely than grass adequately fertilized with inorganic sources of N. To determine if this was a true difference, the effects of rates and source of N on disease development was evaluated under controlled conditions. Results showed that increasing the application rate of N derived from NH4NO3 and NaNo3 from 0 to as much as 2.2 kg. per 93 m2 resulted in a progressive decrease in 3 disease severity as measured by diameter of affected spots resulting from uniform inoculations. This decrease was more apparent at 30 C than at 25 C. Fertilization with an inorganic source of N was not as effective in reducing disease severity. These results substantiate the field observations and establish a basis for further experimentation in the management of fertilization practices for control of pythium blight on ryegrass."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Freeman, T. E. 1973. Influence of nitrogen fertilization on severity of pythium blight of ryegrass. Int. Turfgrass Soc. Annexe - Tech. Pap. p. 24.
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    Last checked: 03/15/2016
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