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Seed Germination and Seedling Emergence of Blackgrass (Alopecurus myosuroides) as Affected by Non–Target-Site Herbicide Resistance
Published online by Cambridge University Press: 17 August 2017
Abstract
Seedling emergence traits of susceptible (S) and resistant (R) blackgrass subpopulations isolated from a single non–target-site resistant (NTSR) population were studied in controlled conditions. The seedling emergence of the R subpopulation was lower and slower than that of the S subpopulation, especially at low temperature and deep burial. The burial depth inhibiting final emergence by 50% for the R subpopulation was significantly lower than that of the S subpopulation at low temperature. The present study revealed that under suboptimal conditions the NTSR loci conferring herbicide resistance were correlated with a fitness cost in relation to seedling emergence traits. The results suggest that deep soil cultivation and delayed sowing of autumn-sown crops can hamper germination of the R more than of the S subpopulation and thus potentially reduce the prevalence of the R subpopulation in the blackgrass population.
Keywords
- Type
- Weed Biology and Ecology
- Information
- Copyright
- © Weed Science Society of America, 2017
Footnotes
Current address of first author: Assistant Professor, Department of Agronomy, Tarbiat Modares University, P.O. Box 14115-111, 1497713111 Tehran, Iran
Associate Editor for this paper: Christopher Preston, University of Adelaide.
References
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