Changes in the herbicide sensitivity and competitive ability of Abutilon theophrasti over 28 years: Implications for hormesis and weed evolution.

Autor: Ethridge SR; Department of Crop and Soil Sciences, North Carolina State University, Raleigh, North Carolina, USA., Chandra S; Department of Crop and Soil Sciences, North Carolina State University, Raleigh, North Carolina, USA., Locke AM; Department of Crop and Soil Sciences, North Carolina State University, Raleigh, North Carolina, USA.; Soybean & Nitrogen Fixation Research, USDA Agricultural Research Service, Raleigh, North Carolina, USA., Everman WJ; Department of Crop and Soil Sciences, North Carolina State University, Raleigh, North Carolina, USA., Jordan DL; Department of Crop and Soil Sciences, North Carolina State University, Raleigh, North Carolina, USA., Owen MDK; Department of Agronomy, Iowa State University, Ames, Iowa, USA., Leon RG; Department of Crop and Soil Sciences, North Carolina State University, Raleigh, North Carolina, USA.
Jazyk: angličtina
Zdroj: Pest management science [Pest Manag Sci] 2023 Oct; Vol. 79 (10), pp. 4048-4056. Date of Electronic Publication: 2023 Jun 29.
DOI: 10.1002/ps.7604
Abstrakt: Background: The potential of weed species to respond to selection forces affecting the evolution of weedy traits such as competitive ability is poorly understood. This research characterized evolutionary growth changes in a single Abutilon theophrasti Medik. population comparing multiple generations collected from 1988 to 2016. A competition study was performed to understand changes in competitive ability, and a herbicide dose-response study was carried out to assess changes in sensitivity to acetolactate synthase-inhibiting herbicides and glyphosate over time.
Results: When grown in monoculture, A. theophrasti biomass production per plant increased steadily across year-lines while leaf number decreased. In replacement experiments, A. theophrasti plants from newer year-lines were more competitive and produced more biomass and leaf area than the oldest year-line. No clear differences in sensitivity to imazamox were observed among year-lines. However, starting in 1995, this A. theophrasti population exhibited a progressive increase in growth in response to a sublethal dose of glyphosate (52 g a.e. ha -1 ), with the 2009 and 2016 year-lines having more than 50% higher biomass than the nontreated control.
Conclusion: This study demonstrates that weeds can rapidly evolve increased competitive ability. Furthermore, the results indicate the possibility of changes in glyphosate hormesis over time. These results highlight the importance of the role that rapid (i.e., subdecadal) evolution of growth traits might have on the sustainability of weed management strategies. © 2023 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
(© 2023 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.)
Databáze: MEDLINE
Externí odkaz: