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| Web URL(s): | https://archive.lib.msu.edu/tic/its/articles/2009jou227.pdf
Last checked: 10/18/2011
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| Publication Type:
| Refereed |
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| Author(s): | Kerns, James P.;
Shew, H. D.;
Benson, D. M.;
Tredway, L. P. |
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| Author Affiliation: | Department of Plant Pathology, North Carolina State University |
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| Title: | Impact of irrigation frequency, organic matter content and creeping bentgrass cultivar on the development of pythium root dysfunction |
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| Section: | Diseases (plant pathology)
Other records with the "Diseases (plant pathology)" Section
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| Meeting Info.: | Santiago, Chile: July 26-30 2009 |
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| Source: | International Turfgrass Society Research Journal. Vol. 11, No. Part 1, 2009, p. 227-239. |
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| Publishing Information: | Madison, WI: International Turfgrass Society |
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| # of Pages: | 13 |
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| Keywords: | TIC Keywords: Irrigation frequency; Organic matter; Agrostis stolonifera; Pythium-induced root dysfunction; Disease susceptibility; Cultivars
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| Abstract/Contents: | "Symptoms of Pythium root dysfunction (PRD) have been observed on multiple golf courses in North Carolina and other southeastern states since 2002. Symptoms appear in irregular patches ranging in diameter from 12 to 40 cm. Initially, symptoms resemble wilt or drought stress then progress to an orange-yellow foliar decline. Our observations indicate that symptoms are most severe on high-sand content putting greens less than 3 years old. It is unknown if this distribution is the result of soil characteristics in newly constructed greens or due to increased susceptibility of modern creeping bentgrass cultivars. Three growth chamber experiments were established to determine the effects of cultivar, organic matter content, and irrigation frequency on PRD development. All creeping bentgrass cultivars were susceptible to P. volutum Vanterp. & Truscott., but differed in their relative susceptibility. 'Crenshaw', 'Syn-96', and 'Penn G-6' were the most resistant cultivars with area under disease progress curve (AUPDC) values of 78, 208, and 252, respectively. Cultivars 'Penn A-1'and 'Penn A-4' were moderately resistant with AUDPC values of 478 and 480, respectively, and 'LS-44', 'Penn G-2', and 'Penncross' were susceptible with AUDPC values of 668, 911, and 1060, respectively. Symptoms of PRD were most severe when creeping bentgrass was irrigated 6 times a week, followed by 4, 3, 2, and 1 times per week. In general, organic matter content at the time of establishment did not affect PRD severity. Our results indicate that cultivars of creeping bentgrass vary in their susceptibility to P. volutum and disease is less severe with reduced irrigation frequency during the infection period. In combination with preventative fungicide programs, golf course superintendents should incorporate creeping bentgrass cultivars with improved resistance and practice deep and infrequent irrigation when conditions are conducive for P. volutum infection." |
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| Language: | English |
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| References: | 19 |
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| Note: | Partial Reprint appears in Carolinas Green, November/December 2009, p. 18
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Kerns, J. P., H. D. Shew, D. M. Benson, and L. P. Tredway. 2009. Impact of irrigation frequency, organic matter content and creeping bentgrass cultivar on the development of pythium root dysfunction. Int. Turfgrass Soc. Res. J. 11(Part 1):p. 227-239. |
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MSU catalog number: b2548899 |
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