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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Chessman, J. H.;
Roberts, E. C. |
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| Author Affiliation: | Iowa State University, Ames, Iowa |
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| Title: | Effect of nitrogen level and moisture stress on Helminthosporium infection in Merion bluegrass |
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| Section: | Crop science divisions: Turfgrass management
Other records with the "Crop science divisions: Turfgrass management" Section
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| Meeting Info.: | Kansas City, Missouri: November 15-19, 1964; 56th Annual Meeting |
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| Source: | Agronomy Abstracts. Vol. 56, 1964, p. 105. |
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| Publishing Information: | [Madison, WI]: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Nitrogen; Water stress; Poa pratensis; Drechslera
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| Abstract/Contents: | "Merion bluegrass turf was produced in standard solution cultures and after 4 months growth was treated with varying levels of nitrogen and of a polyethylene glycol to modify osmotic pressures of the nutrient solution. Plants were inoculated with Helminthosporium sativum to study treatment effects on disease resistance of a well established turf. Nitrogen solutions at 100 ppm. lowered resistance of turf to high temperatures and caused a decrease in foliar growth. Foliage yields decreased as osmotic pressures of the solutions increased from 0.5 to 1.50 atm. High nitrogen and low osmotic pressue combinations produced leaf tissue which was soft and succulent. The average number of Helminthosporium lesions per leaf blade and the average size of lesions increased with increasing levels of nitrogen and decreasing levels of osmotic pressure. Merion bluegrass is highly resistant to Helminthosporium sativum when grown under field conditions. It appears that some modification in development of foliar tissue under specific solution culture treatments increases proneness of the tissue to disease infection. In no instance did the pathogen kill the turf plants." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Chessman, J. H., and E. C. Roberts. 1964. Effect of nitrogen level and moisture stress on Helminthosporium infection in Merion bluegrass. Agron. Abstr. 56:p. 105. |
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MSU catalog number: S1 .A58 |
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