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| Web URL(s): | https://turf.rutgers.edu/wp-content/uploads/2024/03/symposium-2024.pdf#page=28
Last checked: 04/11/2024
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Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Diehl, Katherine;
Elmore, Matthew |
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| Author Affiliation: | Department of Plant Biology, Rutgers University |
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| Title: | Goosegrass (Eleusine indica) competition in turfgrass affected by ecotype and cultural management practices |
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| Section: | Poster presentations
Other records with the "Poster presentations" Section
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| Meeting Info.: | Institute for Food, Nutrition, and Health Building, Room 101: March 14, 2024 |
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| Source: | Proceedings of the Thirty-Third Annual RutgersTurfgrass Symposium. Vol. 33, 2024, p. 28-29. |
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| Publishing Information: | School of Environmental and Biological Sciences, Rutgers University |
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| # of Pages: | 2 |
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| Abstract/Contents: | "Goosegrass (Eleusine indica) is a diverse species, many ecotypes have evolved herbicide resistance and can be difficult to control, especially on golf courses reliant on chemical control. Competitiveness of goosegrass ecotypes has not been investigated under turfgrass management regimens. The objective of this research was to determine effects of mowing height, nitrogen fertilizer, and a plant growth regulator (PGR) on the competitiveness of two different goosegrass ecotypes in a field experiment. Research was conducted on Kentucky bluegrass (Poa pratensis), annual bluegrass (Poa annua) turf at Rutgers Hort Farm No. 2 (North Brunswick, NJ). The site was mowed weekly to 4.0 cm starting 3 May 2023 and fertilized twice with slow-release fertilizer (25 kg N ha-1 ) before the start of the experiment. Treatment factors consisted of; 1) PGR and Nitrogen (N) fertilizer program (hereafter referred to as cultural management) 2) goosegrass ecotype and 3) mowing height. Treatments were arranged in 1 by 2 m plots as a strip-plot RCBD, with a wholeplot factors of cultural management (non-treated, N only, PGR only, and N+PGR) and morphologically distinct goosegrass ecotypes (turf-type and ag-type). These treatments were replicated four times and strips of mowing height (2.0 cm and 4.0 cm) were imposed in each block. Mowing height treatments were initiated 16 May 2023 and applied twice weekly until midOctober. Nitrogen treatments (urea 46-0-0; 25 kg N ha-1 ) and PGR treatments (trinexapac-ethyl; 190 g ai ha-1 ) were applied every 21 days (19 May, 8 June, 29 June, 20 July, 14 August and 4 September) using standard small plot spray equipment. N was applied first and irrigated in immediately after application; PGR treatments were not irrigated. Goosegrass ecotype treatments were innitiated on 10 July 2023, when 20 leaf-stage seedlings from each ecotype were transplanted into field plots in two rows on 13 cm inter-row spacing. Goosegrass tillers on each plant were counted one and three wks after transplanting (WAT). The number of surviving goosegrass plants in each plot was counted 2, 4, 6, 8 and 10 WAT. Goosegrass cover was evaluated visually and determined by grid intersect at 6 and 8 WAT. On 28 September, at 10 WAT, total aboveground goosegrass biomass was harvested. Data were analyzed in SAS (v 9.4) as a strip-plot RCBD and Fishers protected LSD test (α=0.05) to separate means. 29 Interactions between cultural management program (N and PGR treatments) and ecotype were detected in goosegrass cover and biomass data on each date. Mowing height had no effect on goosegrass biomass or cover. In plots not treated with N or PGR, the turf ecotype had more biomass than the ag ecotype (47 g and 6 g, respectively). N alone reduced goosegrass cover and biomass of the turf ecotype by >50% compared to the non-treated, but N treatment did not affect the ag ecotype. PGR treatment increased biomass of both the ag and turf ecotypes by 31% and 549%, respectively, compared to the non-treated, and the turf ecotype treated with PGR alone had the greatest biomass of all treatments (63 g). N+PGR treatment reduced goosegrass biomass by 23% compared to the nontreated for the turf ecotype, but increased biomass of the ag ecotype to 234% of the nontreated. This research shows the PGR trinexapac-ethyl can increase the competitiveness goosegrass in turf, despite having a positive effect on turfgrass density. Trinexapac-ethyl increased the competitiveness of ag ecotypes more than turf ecotypes. Nitrogen treatment reduced goosegrass competitiveness overall, but the magnitude of the effect varied by ecotype. A second run of this experiment will be conducted in summer 2024." |
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| Language: | English |
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| References: | 0 |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Diehl, K., and M. Elmore. 2024. Goosegrass (Eleusine indica) competition in turfgrass affected by ecotype and cultural management practices. Proc. Rutgers Turfgrass Symp. 33:p. 28-29. |
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| Web URL(s):
https://turf.rutgers.edu/wp-content/uploads/2024/03/symposium-2024.pdf#page=28
Last checked: 04/11/2024
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: b3696858 |
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