Full TGIF Record # 333386
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Web URL(s):https://scisoc.confex.com/scisoc/2023am/meetingapp.cgi/Paper/152804
    Last checked: 11/30/2023
Publication Type:
Content Type:Abstract or Summary only
Author(s):Xu, Zhongqi; Murphy, James A.; Clarke, Bruce B.; Ward, Daniel
Author Affiliation:Xu: Presenting Author and New Jersey, Rutgers University, Highland Park, NJ; Murphy and Clarke: Department of Plant Biology, Rutgers University, New Brunswick, NJ; Ward: Rutgers University
Title:Mat layer pH, Ca and leaf tissue Ca effects on anthracnose of annual bluegrass turf
Section:Turf pest management oral I (includes student competition)
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C05 turfgrass science
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Meeting Info.:St. Louis, Missouri: October 29-November 1, 2023
Source:ASA, CSSA, SSSA International Annual Meeting. 2023, p. 152804.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Abstract/Contents:"Annual bluegrass (ABG) [Poa annua L. forma reptans (Hausskn.) T. Koyama] is adapted to slightly acidic soil. A 10-yr field trial was continued at the Rutgers Hort Farm 2 in North Brunswick, NJ during 2019, 2020, and 2021 with the objective of evaluating the effect of soil amendments on mat layer pH, mat layer and leaf tissue Ca, and anthracnose (caused by Colletotrichum cereale Manns sensu lato Crouch, Clarke, and Hillman) severity, and the anthracnose response to changes in mat pH, mat layer and leaf tissue Ca, and other nutrients on ABG maintained as putting green turf. Ten treatments were evaluated using a randomized complete block design with four blocks. Treatments consisted of five rates of lime, two rates of sulfur, two rates of gypsum, and one non-treated control. Multiple regression and random forest models were used to evaluate the relationship between treatments response variables and anthracnose severity measured as area under disease progress curve (AUDPC). The final multiple regression model included the factors and interactions of mat layer Ca, year, mat layer pH x year, and leaf tissue Ca x year. Over the three-year study, higher leaf tissue and mat layer Ca reduced AUDPC. Higher mat layer pH only reduced AUDPC in 2021. Findings from the Random Forest Model indicated that leaf tissue and mat layer Ca, and year were the major factors affecting anthracnose severity. The random forest model suggested that other nutritional factors such as Mn may affect anthracnose rather than mat layer pH directly affecting disease. Further research is needed to determine the effect of a broader range of mat layer and leaf tissue Ca concentrations and other nutrients on anthracnose severity of ABG."
See Also:See also related item "Soil pH effect on anthracnose of annual bluegrass" Proceedings of the Thirty-First Annual Rutgers Turfgrass Symposium, March 17 2022, p. 61, R=330578. R=330578

See also related item "Soil pH effect on anthracnose of annual bluegrass" ASA, CSSA and SSSA International Annual Meetings, 2021, p. 136661, R=317157. R=317157
This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Xu, Z., J. A. Murphy, B. B. Clarke, and D. Ward. 2023. Mat layer pH, Ca and leaf tissue Ca effects on anthracnose of annual bluegrass turf. Agron. Abr. p. 152804.
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    Last checked: 11/30/2023
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