Full TGIF Record # 333444
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Web URL(s):https://scisoc.confex.com/scisoc/2023am/meetingapp.cgi/Paper/153669
    Last checked: 12/04/2023
Publication Type:
Content Type:Abstract or Summary only
Author(s):Tang, Kaiyuan; Kaminski, John E.; Shahoveisi, Fereshteh
Author Affiliation:Tang: Presenting Author and Plant Science, The Pennsylvania State University, University Park, PA; Kaminski: Pennsylvania State University, University Park, PA; Shahoveisi: Ag Solutions, College Park, MD
Title:Annual bluegrass seedling emergence pattern
Section:Turfgrass science 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. 153669.
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.) is considered as an undesirable species in turfgrass systems in the United States. To effectively manage ABG, it is important to be able to accurately predict ABG seedling emergence. Four 50 cm x 50 cm or 1 m x 1 1m plots were established on ABG maintained fairway at FL, GA, NC, OR, TX, VA and both green and fairway at PA. Initial plots were established in Sep. 2019 and additional four plots were set at each location in spring 2020, fall 2020 and spring 2021. Grass within each plot was killed by glyphosate (2304 g a.i. /ha) prior to counting seedling emergence. Seedling emergence was counted every two weeks and removed after each count to allow for subsequent emergence. Soil temperature and moisture was also documented. Logistic regression models were analyzed with average under heat and wet (AUH, AUW). Cumulative percentage of seedling emergence was calculated. On Valentine putting green, ABG in 2019 fall plots reached 45% seedling emergence in early Oct. 2019 and achieved another 45% emergence from Apr. to Jul. 2020. Annual bluegrass in Valentine fairway 2019 fall plots reached 75% of seedling emergence in early Oct., while on the 2020 spring plots, it reached 45% emergence in late Jun. 2020 and had 40% emergence during the fall 2020. In Harrisburg fairway 2020 spring plots, ABG seedling emergence reached to 60% in early Jun. and had 25% of increase from Sep. to Oct. 2020. Generally, more than 80% seedling emergence occurred during spring and fall when soil temperature range between 10┬░C to 20┬░C. Across all states, it has more than 69 % chance when AUH over 2000 and 85% chance when AUH was 3000 to 3500 to have 110 seedlings / m2."
See Also:Original version appears in ASA, CSSA, SSSA International Annual Meeting, 2022, p. 142525, R=324993. R=324993
This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Tang, K., J. E. Kaminski, and F. Shahoveisi. 2023. Annual bluegrass seedling emergence pattern. Agron. Abr. p. 153669.
Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=333444
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    Last checked: 12/04/2023
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