Full TGIF Record # 88263
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Web URL(s):http://www.tandfonline.com/doi/pdf/10.1081/PLN-120021057
    Last checked: 11/04/2015
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Publication Type:
Author(s):Hill, Wendy J.; Heckman, Joseph R.; Clarke, Bruce B.; Murphy, James A.
Author Affiliation:Department of Plant Biology and Pathology, Rutgers, The State University of New Jersey, New Brunswick, New Jersey
Title:Summer patch disease severity on Kentucky bluegrass in response to fertilizer source
Source:Journal of Plant Nutrition. Vol. 26, No. 7, July 2003, p. 1499-1512.
# of Pages:14
Publishing Information:New York: Marcel Dekker, Inc.
Keywords:TIC Keywords: Magnaporthe poae; Disease control; Cultural control; Summer patch; Disease severity; Poa pratensis; Nitrogen fertilization; Nitrogen fertilizers; Ammonia; Nitrates; Urea; Potassium
Trade Names:N-Sure
Abstract/Contents:"Summer patch is caused by the ectotrophic, root-infecting fungus Magnaporthe poae Landschoot and Jackson. The disease, which often infects high maintenance turf, can be difficult to control because root infection often occurs six to eight weeks before the appearance of foliar symptoms. Disease severity is reduced when turf is fertilized with ammonium nitrogen (N) sources, compared to nitrate or urea sources of N. Thiosulfate, from (NH4)2S2O3 or K2S2O3, is a nitrification. N-SURE is a triazone-based, slow release N source that is commonly used to fertilize turfgrass. Field studies were conducted from 1995 to 1996 on Kentucky bluegrass (Poa pratensis L.) grown on a Nixon loam (fine-loamy, mixed, mesic typic Hapludult) to evaluate the effectiveness of the several N and K sources for thier ability to control summer patch disease. Nitrogen fertilizers, N-SURE, (NH4)2S2O3, and (NH4)2SO4, were applied in combination with either K2SO4 or K2S2O3. The severity of summer patch was greater when the turf was fertilized with N-SURE in 1995 and 1996 and urea in 1996 compared to (NH4)2S2O3. The N sources, (NH4)2SO4 and (NH4)2S2O3, were strongly acidifying to the upper 10cm of soil and were very effective in controlling summer patch. The application of K2S2O3 slightly acidified the upper 5cm of soil but did not suppress the development of summer patch. The ability of thiosulfate to act as a nitrification inhibitor did not appear to play a role in the suppression of summer patch. Since foliar burn may occur if (NH4)2SO4, (NH4)2S2O3, or K2S2O3 are applied to turf without irrigation, the application of water after their use is recommended."
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hill, W. J., J. R. Heckman, B. B. Clarke, and J. A. Murphy. 2003. Summer patch disease severity on Kentucky bluegrass in response to fertilizer source. J. Plant Nutr. 26(7):p. 1499-1512.
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    Last checked: 11/04/2015
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    Access conditions: Item is within a limited-access website
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MSU catalog number: QK 867 .J67
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