Full TGIF Record # 325024
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Web URL(s):https://scisoc.confex.com/scisoc/2022am/meetingapp.cgi/Paper/142095
    Last checked: 01/31/2023
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Vukovic, Vera; Patton, Aaron J.
Author Affiliation:Vukovic: Presenting Author and Purdue University; Patton: Purdue University
Title:Prevalence of ethofumesate resistant annual bluegrass on US golf courses
Section:Turfgrass pest management poster: Diseases, insects, weeds I (includes student competition)
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C05 turfgrass science
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Meeting Info.:Baltimore, Maryland: November 6-9, 2022
Source:ASA, CSSA, SSSA International Annual Meeting. 2022, p. 142095.
# of Pages:1
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
Abstract/Contents:"Annual bluegrass (Poa annua L.) is the most troublesome weed in turf. Herbicide options for annual bluegrass control on golf courses are limited, and repeated applications are often necessary. Annual bluegrass is a prolific seed producer, which allows for more rapid development of herbicide resistance. Ethofumesate resistant annual bluegrass plants have already been documented in grass seed production in Oregon. Therefore, a dose-response experiment was initiated to determine the potential level of ethofumesate resistance in Poa annua L. on golf courses. Seed from 28 populations was collected from golf courses in AL, CA, IN, and OR. Additionally, two populations, one with known resistance and one with known susceptibility, were identified in preliminary testing and used as controls in this experiment. Individual seedlings from each population were transplanted into separate cone-tainers, then grown in the greenhouse until they reached 2-3 tillers in size, immediately prior to herbicide application. Ten doses of ethofumesate were applied using a compressed air track spray chamber: 0, 0.6, 1.1, 2.8, 5.6, 8.4, 11.2, 16.8, 22.4, and 44.8 (with 1.1 to 2.2 kg ai ha-1 as the label application rates for perennial ryegrass). Biomass of plants was collected 28 days after application. Populations with resistance to susceptible ratio from 1.0 to 5.3 were found on golf courses. The most resistant population was found in CA with ED50 12.7 kg ai ha-1. The results show that annual bluegrass develops resistance to ethofumesate in managed turf and the need for practitioners to implement resistance prevention measures."
This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Vukovic, V., and A. J. Patton. 2022. Prevalence of ethofumesate resistant annual bluegrass on US golf courses. Agron. Abr. p. 142095.
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    Last checked: 01/31/2023
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