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| Web URL(s): | https://www.wsweedscience.org/wp-content/uploads/WSWS-Proceedings-2020.pdf#page=132
Last checked: 04/17/2024
Requires: PDF Reader
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 H.;
Elmore, Matthew T.;
Brosnan, James;
Boggess, Sarah;
Trigiano, Robert N. |
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| Author Affiliation: | Diehl and Elmore: Rutgers University, New Brunswick, NJ; Brosnan, Boggess, and Trigiano: University of Tennessee, Knoxville, TN |
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| Title: | Goosegrass (Elusine [Eleusine] indica) resistance to mitotic inhibiting herbicides in cool-season turfgrass |
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| Section: | Poster session
Other records with the "Poster session" Section
WSSA section 3: Turf and ornamentals
Other records with the "WSSA section 3: Turf and ornamentals" Section
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| Meeting Info.: | Maui, Hawaii: March 2-5, 2020 |
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| Source: | Western Society of Weed Science Annual Meeting 2020. Vol. 73, March 2020, p. 99-100. |
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| Publishing Information: | Westminster, Colorado: Western Society of Weed Science |
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| # of Pages: | 2 |
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| Abstract/Contents: | "Field and laboratory experiments were conducted to evaluate the response of three goosegrass populations on golf courses in New Jersey and Pennsylvania to microtubule-inhibiting herbicides. The golf course superintendent at each location reported poor goosegrass control following many consecutive years of microtubule-inhibiting herbicide use. Field research was conducted at these locations in 2017 and 2018 to evaluate the efficacy of dithiopyr, prodiamine, and oxadiazon for goosegrass control. The New Jersey golf course sites, East Brunswick and Manalapan, New Jersey, were perennial ryegrass (Lolium perenne) fairways. The Philadelphia Pennsylvania site was a golf course rough. Treatments consisted of single and sequential PRE applications of dithiopyr and prodiamine (applying a total of 0.56 to 0.84 kg dithiopyr ha-1 and 0.56 to 1.12 kg prodiamine ha-1 ) compared to various oxadiazon programs (= 2.24 kg ha-1 ). At the Manalapan location all dithiopyr and prodiamine treatments provided < 10% goosegrass control at 15 weeks after treatment compared to = 90% control for oxadiazon. Similar results were observed at the East Brunswick location. At the Philadelphia location, sequential dithiopyr applications provided 95% control, whereas both prodiamine programs and the single dithiopyr application resulted in < 20% control. Goosegrass plants were collected from dithiopyr-treated plots at these sites and grown in a greenhouse to flower and produce seed for further testing. Laboratory experiments were conducted to determine sensitivity of these three putative resistant goosegrass populations to dithiopyr and prodiamine compared to a known susceptible population. A bioassay to determine goosegrass seedling root response to dithiopyr and prodiamine at 0, 0.01, 0.05, 1.0, and 10.0 µM 100 was conducted using Murashige and Skoog (MS) media in Petri dishes. Roots of emerged plants were imaged and root length determined 21 days after planting using WinRhizo software. Root length data were subjected to non-linear regression in Prism. A lack of fit F-test (a=0.05) was conducted in Prism to determine if responses varied among populations. The a-tubulin (TUA1) gene from putative resistant populations were amplified, sequenced, and examined for a threonine to isoleucine substitution at position 239. Exposure to dithiopyr at 0.01 µM reduced root length of the susceptible and Pennsylvania populations to 0% of the non-treated, whereas the East Brunswick and Manalapan populations maintained root length values that were 85 and 100% of the non-treated control, respectively. Estimated GR50 values were 0.05 and 0.02 µM for the East Brunswick and Manalapan populations, respectively. Prodiamine at all rates completely inhibited root growth of all populations. The Thr-239-Ile target site mutation often responsible for resistance to mitotic-inhibiting herbicides was not detected in any of the populations. These results indicated that goosegrass populations from two different golf courses in New Jersey were resistant to dithiopyr, but the mechanism of resistance is unknown. Research to elucidate the mechanism of resistance is ongoing." |
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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):
Diehl, K. H., M. T. Elmore, J. Brosnan, S. Boggess, and R. N. Trigiano. 2020. Goosegrass (Elusine [Eleusine] indica) resistance to mitotic inhibiting herbicides in cool-season turfgrass. Proc. West. Soc. Weed Sci. 73:p. 99-100. |
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| Web URL(s):
https://www.wsweedscience.org/wp-content/uploads/WSWS-Proceedings-2020.pdf#page=132
Last checked: 04/17/2024
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: b2224583 |
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