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| Web URL(s): | http://www.swss.ws/wp-content/uploads/2022_SWSS_Proceedings_Final-04-002.pdf#page=211
Last checked: 12/13/2022
Requires: PDF Reader
Notes: Item is within a single large file; Abstract only |
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| Publication Type:
| Report |
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| Author(s): | Putri, A. D. |
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| Author Affiliation: | Mississippi State University, Mississippi State, MS |
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| Title: | Programmatic approaches to control Quinclorac-resistant smooth crabgrass (Digitaria ishaemum) in bermudagrass (Cynodon Spp.) turf |
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| Meeting Info.: | January 23-27, 2022 |
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| Source: | Proceedings of the Southern Weed Science Society 75th Annual Meeting. Vol. 75, 2022, p. 145. |
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| Publishing Information: | Biloxi, MS: Southern Weed Science Society |
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| # of Pages: | 1 |
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| Abstract/Contents: | "The auxin-mimicking herbicide quinclorac controls crabgrass (Digitaria spp.) post-emergence in cool- and warm-season turfgrass species. Quinclorac-resistance has been confirmed in smooth (D. ischaemum) and large crabgrass (D. sanguinalis). Two Mississippi smooth crabgrass populations suspected of quinclorac resistance were characterized using standard rate-response screens. They required 5 and 80 times more quinclorac to reach 50% biomass reduction than susceptible populations. Field experiments were conducted to evaluate programmatic approaches to control a resistant population. Treatments included the sequential application of pre-emergence herbicides on February 17/April 10, 2020, and February 25/April 6, 2021, alone or in combination with 0.84 kg quinclorac ha-1 applied post-emergence on April 10, 2020, and April 6, 2021, followed by a second application of quinclorac alone on June 18, 2020, and June 16, 2021. Pre-emergence treatments included 0.05 kg indaziflam ha-1 , 0.84 kg prodiamine ha-1 , 0.56 kg dithiopyr ha1 , and 0.47 kg prodiamine ha-1 + 0.21 kg imazaquin ha1 + 0.73 kg simazine ha-1 . Commercial standards applied on April 10/June 18, 2020, and April 6/June 16, 2021, included: 0.16 kg pinoxaden ha-1 and 2.27 kg MSMA ha-1 . Four weeks after the last application, all treatments except quinclorac (2020 and 2021), dithiopyr (2020), and pinoxaden (2020) controlled quinclorac-resistant smooth crabgrass greater than 90%. Various standard preemergence herbicides adequately controlled the resistant population. The combination of quinclorac with preemergence strategies provided greater control of smooth crabgrass than quinclorac alone. Ongoing research investigates the mechanism of quinclorac-resistance in the two Mississippi populations. Future research should screen a wider distribution of populations, and cross- and multiple-resistance should be investigated." |
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| Language: | English |
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| References: | 0 |
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| See Also: | Related abstract appears in ASA, CSSA, SSSA International Annual Meeting, 2022, p. 142049, with variant title "Confirmation and mechanism of resistance of quinclorac-resistant smooth crabgrass (Digitaria ischaemum)", R=324997. R=324997 |
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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):
Putri, A. D. 2022. Programmatic approaches to control Quinclorac-resistant smooth crabgrass (Digitaria ishaemum) in bermudagrass (Cynodon Spp.) turf. South. Weed Sci. Soc. Proc. 75:p. 145. |
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| Web URL(s):
http://www.swss.ws/wp-content/uploads/2022_SWSS_Proceedings_Final-04-002.pdf#page=211
Last checked: 12/13/2022
Requires: PDF Reader
Notes: Item is within a single large file; Abstract only |
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MSU catalog number: b2207931 |
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