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| Web URL(s): | http://turf.rutgers.edu/research/abstracts/symposium2016.pdf#page=21
Last checked: 07/20/2016
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Schmid, Charles J.;
Murphy, James A.;
Clarke, Bruce B. |
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| Author Affiliation: | Department of Plant Biology & Pathology, Rutgers University |
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| Title: | Anthracnose of annual bluegrass: How our understanding of soil fertility requirements has changed over the past five years |
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| Section: | Plenary presentations
Other records with the "Plenary presentations" Section
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| Meeting Info.: | New Brunswick, New Jersey: March 18, 2016 |
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| Source: | Proceedings of the Twenty-Fifth Annual Rutgers Turfgrass Symposium. Vol. 25, 2016, p. 21. |
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| Publishing Information: | New Brunswick, New Jersey: The Center for Turfgrass Science, Rutgers, The State University of New Jersey |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Ammonium nitrate; Anthracnose; Colletotrichum graminicola; Cultural control; Disease control; Disease severity; Fertilization rates; Fertilizer evaluation; IBDU; Poa annua; Potassium nitrate
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| Abstract/Contents: | "Anthracnose (caused by Colletotrichum cereal Manns sensu lato Crouch, Clarke & Hillman) of annual bluegrass [Poa annua L. f. reptans (Hausskn) T. Koyama; ABG] turf is a destructive disease that is strongly influenced by cultural management practices. Optimizing the management of N fertility has proven to be one of the most effective cultural practices to reduce the severity of this disease. Field studies conducted over a period of six years on ABG turf maintain at 2.8 - 3.2 mm have enabled us to better understand the response of anthracnose disease to N fertility practices, as well as the influence of soil potassium and spoil pH on disease development. Initial research investigating the role of N fertility found that both slow release (IBDU) and soluble N (ammonium nitrate) influenced the disease, with slow release N applied in the spring at 146 or 219 kg ha-1 and soluble N applied at 4.6 kg ha-1 wk-1 in the summer resulting in the greatest reduction in anthracnose severity. Further study of soluble N applied rom late-May through mid-August found that weekly applications at 10 kg ha-1 provided the greatest reduction in anthracnose severity compared to higher and lower rates of the same N source. A third field study investigated the effect of N source on anthracnose. Results from this trial indicated that potassium nitrate applied at 4.9 kg N ha-1 wk-1 provided the greatest reduction in anthracnose severity, whereas, ammonium sulfate applied at the same rate resulted in the least reduction in disease severity. However, because these N sources were also altering soil pH or potassium (K) levels, it was unclear whether these factors were contributing to the N source response. Thus, two additional field trials were conducted to evaluate the impact of soil pH and soil K on anthracnose development. A study investigating the effect of K source and rate on anthracnose found that deficient levels of K in soil increased disease severity. Analysis of soil and leaf tissue date indicated that critical K values were 50 mg kg-1 and 20 g kg-1, respectively, with lower levels resulting in greater disease severity. A fifth field study investigating the influence of soil pH on anthracnose and turf quality found that disease severity decreased and turf quality was better at a soil pH > 6.0. These studies have clearly demonstrated that the proper management on N and K nutrition and soil pH can greatly reduce anthracnose severity on ABG putting green turf." |
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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):
Schmid, C. J., J. A. Murphy, and B. B. Clarke. 2016. Anthracnose of annual bluegrass: How our understanding of soil fertility requirements has changed over the past five years. Proc. Rutgers Turfgrass Symp. 25:p. 21. |
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| Web URL(s):
http://turf.rutgers.edu/research/abstracts/symposium2016.pdf#page=21
Last checked: 07/20/2016
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: b3696858 |
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