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| Web URL(s): | https://scisoc.confex.com/crops/2015am/webprogram/Paper95053.html
Last checked: 11/20/2015 |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Beck, Leslie;
Patton, Aaron J. |
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| Author Affiliation: | Beck: New Mexico State University, Las Cruces, NM; Patton: Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, IN |
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| Title: | Development of herbicide resistant smooth crabgrass following quinclorac use in fine turf |
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| Section: | C05 turfgrass science
Other records with the "C05 turfgrass science" Section
Turfgrass science: II
Other records with the "Turfgrass science: II" Section
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| Meeting Info.: | Minneapolis, Minnesota: November 15-18, 2015 |
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| Source: | ASA, CSSA and SSSA International Annual Meetings. 2015, p. 95053. |
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| Publishing Information: | [Milwaukee, Wisconsin]: [American Society of Agronomy and the Entomological Society of America] |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Application rates; Cultivar evaluation; Digitaria ischaemum; Digitaria sanguinalis; Herbicide resistance; Postemergence weed control; Preemergence weed control; Quinclorac
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| Abstract/Contents: | "Crabgrass (Digitaria spp.) is one of the most common and widespread turfgrass weeds in the United States. Quinclorac is an herbicide that provides postemergence control of both smooth (Digitaria ischaemum (Schreb.) Schreb. ex Muhl.) and large crabgrass (Digitaria sanguinalis (L.) Scop.). However, a population of smooth crabgrass located on a golf course tee in Franklin, Indiana was unresponsive to applications of the label rate (0.84 kg ha-1) and up to 3X the label rate (2.52 kg ha-1) of quinclorac (Drive 75 DF) following <12 years of use. Dose response experiments were conducted twice in the greenhouse to determine the level of quinclorac resistance in this population. Plants were grown either from smooth crabgrass seed collected from the Franklin, Indiana location or a purchased susceptible population for comparison. Both resistant (R) and susceptible (S) smooth crabgrass plants were treated with a wide range (0.01x to 80x label rate) of quinclorac application rates in order to obtain the effective dose required to affect plant response 50% relative to the upper and lower limit (ED50). Using both fresh plant biomass and visual control ratings 14 days after treatment (DAT), the ED50 was estimated to range from 0.10 to 0.41 kg ha-1 for the quinclorac susceptible smooth crabgrass population which is consistent with a labeled herbicide rate of 0.84 kg ha-1. For the suspected quinclorac resistant smooth crabgrass population, ED50 ranged from 3.8 to >30 kg ha-1. The quinclorac resistant smooth crabgrass biotype was >37-fold resistant to quinclorac as calculated by the R/S ratio. To avoid the develop of quinclorac resistance in smooth crabgrass, alternate the mechanism of action for postemergence herbicide applications, use preemergence herbicides when reseeding of desirable turf is not needed, and enhance cultural controls where possible." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only!
"418-2"
"Poster Number 714" |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Beck, L., and A. J. Patton. 2015. Development of herbicide resistant smooth crabgrass following quinclorac use in fine turf. Agron. Abr. p. 95053. |
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Last checked: 11/20/2015 |
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