Full TGIF Record # 317067
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Web URL(s):https://scisoc.confex.com/scisoc/2021am/meetingapp.cgi/Paper/136559
    Last checked: 03/28/2022
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Xu, Zhongqi; Murphy, James A.; Clarke, Bruce B.
Author Affiliation:Xu: Rutgers University, New Brunswick, NJ; Murphy and Clarke: Department of Plant Biology, Rutgers University, New Brunswick, NJ
Title:Potassium fertilization effect on dollar spot of annual bluegrass and creeping bentgrass
Section:Turfgrass pest management oral I (includes student competition)
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C05 turfgrass
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Meeting Info.:Salt Lake City, Utah: November 7-10, 2021
Source:ASA, CSSA and SSSA International Annual Meetings. 2021, p. 136559.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Abstract/Contents:"Potassium is an essential nutrient for the growth and stress tolerance of plants. However, the effect of potassium on dollar spot (caused by Clarireedia jacksonii) of annual bluegrass (ABG) [Poa annua L. forma reptans (Hausskn.) T. Koyama] and creeping bentgrass [Agrostis stolonifera] is largely unknown. A field trail was initiated in 2020 to determine the effect of K fertilization on dollar spot of ABG and creeping bentgrass turf mowed at 2.8-mm. A 4 ├Ś 2 factorial arranged as a randomized complete block design with four replications evaluated four levels of potassium (0, 3.4, 6.9, 13.8 kg K ha-1 applied every two weeks) and two levels of N (urea) applied at 4.9 kg ha-1 every 7 days or 28 days over 28 weeks. Each plot was inoculated with the dollar spot pathogen in mid-September of 2020. Infection centers were counted every 2 to 6 days over 2 weeks and used to calculate the area under disease progress curve for each plot. There was a linear increase in the dollar spot response to increased K fertilization rate of creeping bentgrass, regardless of the N level in 2020. However, the K fertilization response to dollar spot of ABG depended on the N fertilization level in 2020. Dollar spot did not respond to K fertilization when turf was fertilized with N every 28-d; whereas there was a quadratic increase in dollar spot as K fertilization increased on turf fertilized with N every 7-d. Generally, potassium fertilization can aid in the development of dollar spot on both two common putting green turf. Whether to apply potassium fertilization should be evaluated carefully by the superintends when dollar spot pressure in high. This study is continuing in 2021 to determine if the response observed in 2020 can be reproduced."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Xu, Z., J. A. Murphy, and B. B. Clarke. 2021. Potassium fertilization effect on dollar spot of annual bluegrass and creeping bentgrass. Agron. Abr. p. 136559.
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    Last checked: 03/28/2022
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