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DOI: | 10.1002/ps.5740 |
Web URL(s): | https://onlinelibrary.wiley.com/doi/10.1002/ps.5740 Last checked: 12/16/2020 Access conditions: Item is within a limited-access website https://onlinelibrary.wiley.com/doi/epdf/10.1002/ps.5740 Last checked: 12/16/2020 Requires: PDF Reader Access conditions: Item is within a limited-access website |
Publication Type:
| Refereed |
Author(s): | Brosnan, James T.;
Vargas, José J.;
Spesard, Bruce;
Netzband, Derek;
Zobel, John M.;
Chen, Jinyi;
Patterson, Eric |
Author Affiliation: | Brosnan and Vargas: Department of Plant Sciences, University of Tennessee, Knoxville, TN, United States; Spesard: Bayer Crop Science Division, Cary, NC, United States; Netzband: Bayer Crop Science Division, Chester?eld, MO, United States; Zobel: Department of Forest Resources, University of Minnesota, St. Paul, MN, United States; Chen and Patterson: Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, MI, United States |
Title: | Annual bluegrass (Poa annua) resistance to indaziflam applied early-postemergence |
Source: | Pest Management Science. Vol. 76, No. 6, June 2020, p. 2049-2057. |
Publishing Information: | Barking, Essex, United Kingdom: Elsevier Science Publishers Ltd. |
# of Pages: | 8 |
Related Web URL: | https://onlinelibrary.wiley.com/doi/abs/10.1002/ps.5740 Last checked: 12/16/2020 Notes: Item description page https://onlinelibrary.wiley.com/doi/epdf/10.1002/ps.5883 Last checked: 12/16/2020 Notes: Cover and Item desription page |
Keywords: | Author-Supplied Keywords: annual bluegrass; cellulose biosynthesis; indaziflam; non-target site resistance (NTSR); resistance; turfgrass
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Abstract/Contents: | "BACKGROUND: Indaziflam is an alkylazine herbicide used to control annual bluegrass (Poa annua L.). Several locations in the southeastern USA reported poor annual bluegrass control following treatment with indaziflam during autumn 2015. A series of controlled environment experiments were conducted to confirm putative resistance to indaziflam in annual bluegrass collected from these field locations. RESULTS: Indaziflam (25 g ha-1) effectively controlled all putative-resistant annual bluegrass collections when applied preemergence (PRE), but was ineffective when applied early-postemergence (< 2.5 cm plant height; BBCH scale = 1; EPOST). In agarose-based plate assays, EPOST I50 values for putative-resistant collections ranged from 2424 to 4305 pm compared with 633 pm for the herbicide-susceptible control; therefore, resistance indexes (R/S) ranged from 3.8 to 6.8. Resistant collections were not controlled by foramsulfuron, flumioxazin, glyphosate, glufosinate, metribuzin, pronamide, or simazine applied EPOST. Indaziflam content in herbicide-susceptible annual bluegrass was greater than a resistant collection from 0 to 10 days after treatment (DAT). Susceptibility was not restored when resistant collections were treated with indaziflam plus 1-aminobenzotriazole (10 mg L-1), tebuconazole (1510 g ha-1), or malathion (400 g ha-1). CONCLUSIONS: This is a first report of resistance to indaziflam in any plant. Additionally, we confirm that these annual bluegrass collections are resistant to several other herbicidal modes-of-action. It is unclear if this multi-herbicide resistance is due to a single resistance gene, multiple resistance genes, non-target site mechanisms, or a combination thereof. Additional research to better understand resistance mechanisms in these annual bluegrass collections is warranted. © 2020 Society of Chemical Industry" |
Language: | English |
References: | 23 |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Brosnan, J. T., J. J. Vargas, B. Spesard, D. Netzband, John M. Zobel, Jinyi Chen, et al. 2020. Annual bluegrass (Poa annua) resistance to indaziflam applied early-postemergence. Pest Management Science. 76(6):p. 2049-2057. |
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| DOI: 10.1002/ps.5740 |
| Web URL(s): https://onlinelibrary.wiley.com/doi/10.1002/ps.5740 Last checked: 12/16/2020 Access conditions: Item is within a limited-access website https://onlinelibrary.wiley.com/doi/epdf/10.1002/ps.5740 Last checked: 12/16/2020 Requires: PDF Reader Access conditions: Item is within a limited-access website |
| MSU catalog number: b2219665 |
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