Glyphosate-resistant and susceptible downy brome (Bromus tectorum) management with soil-applied residual herbicides
Glyphosate-resistant and susceptible downy brome (Bromus tectorum) management with soil-applied residual herbicides
Simple item page
Full item details
- creativework.keywords - en
- glyphosate
- canola
- saflufenacil
- downy brome
- cheatgrass
- herbicide layering
- herbicide mixture
- soil properties
- creativework.keywords - fr
- saflufénacil
- glyphosate
- brome des toits
- Colza canola
- marcottage d'herbicides
- résistance aux herbicides
- propriétés du sol
- dc.contributor.author
- Geddes, Charles M.
- Pittman, Mattea M.
- dc.date.accepted
- 2024-04-10
- dc.date.accessioned
- 2024-06-20T15:36:53Z
- dc.date.available
- 2024-06-20T15:36:53Z
- dc.date.issued
- 2024-04-29
- dc.date.submitted
- 2024-01-02
- dc.description.abstract - en
- Downy brome is a cleistogamous facultative winter-annual grass weed that invades cropland, pastureland, and ruderal areas in western North America. Glyphosate-resistant downy brome, the first known glyphosate-resistant grass weed in Canada, was confirmed in a glyphosate-resistant canola field in southern Alberta in 2021. A controlled-environment study was conducted to determine the impact of preemergence soil-applied residual herbicides on glyphosate-resistant and susceptible downy brome in two field soils. Flumioxazin/pyroxasulfone (70/89 g ai ha−1), carfentrazone/pyroxasulfone (18/150 g ai ha−1), sulfentrazone/pyroxasulfone (100/100 or 150/150 g ai ha−1), and saflufenacil/pyroxasulfone (36/120 g ai ha−1) resulted in excellent (≥90%) visible control and downy brome biomass reduction 8 wk after treatment (WAT). The low rate of carfentrazone/pyroxasulfone (12/100 g ai ha−1) resulted in good (≥80%) visible control and biomass reduction 8 WAT, while the low and medium rates of saflufenacil/pyroxasulfone (18/60 or 25/84 g ai ha−1) resulted in ≥80% biomass reduction but suppression only (66% to 75%) based on visible control. Flumioxazin alone (105 g ai ha−1) resulted in good visible control (81%) 8 WAT in a sandy loam soil, but poor (13%) control in a clay loam soil. Soil type affected plant growth as evidenced by reduced growth in the untreated sandy loam soil compared to clay loam soil. The glyphosate-resistant population emerged and grew more vigorously than the glyphosate-susceptible population resulting in greater plant densities in the untreated control and some less-effective herbicide treatments. These results suggest that mixtures of a protoporphyrinogen oxidase-inhibiting herbicide with the very-long-chain fatty acid elongase inhibitor pyroxasulfone applied preemergence at ≥89 g ai ha−1 could be effective components of an herbicide layering strategy targeting glyphosate-resistant and glyphosate-susceptible downy brome.
- dc.identifier.citation
- Geddes, C. M., & Pittman, M. M. (2024). Glyphosate-resistant and susceptible downy brome (Bromus tectorum) management with soil-applied residual herbicides. Weed Technology, 38, e36. 10.1017/wet.2024.22
- dc.identifier.doi
- https://10.1017/wet.2024.22
- dc.identifier.issn
- 0890-037X
- 1550-2740
- dc.identifier.uri
- https://open-science.canada.ca/handle/123456789/2616
- dc.language.iso
- en
- dc.publisher
- Weed Science Society of America
- dc.rights - en
- Creative Commons Attribution 4.0 International (CC BY 4.0)
- dc.rights - fr
- Creative Commons Attribution 4.0 International (CC BY 4.0)
- dc.rights.uri - en
- https://creativecommons.org/licenses/by/4.0/
- dc.rights.uri - fr
- https://creativecommons.org/licenses/by/4.0/deed.fr
- dc.subject - en
- Nature and environment
- Agriculture
- dc.subject - fr
- Nature et environnement
- Agriculture
- dc.subject.en - en
- Nature and environment
- Agriculture
- dc.subject.fr - fr
- Nature et environnement
- Agriculture
- dc.title - en
- Glyphosate-resistant and susceptible downy brome (Bromus tectorum) management with soil-applied residual herbicides
- dc.type - en
- Article
- dc.type - fr
- Article
- local.acceptedmanuscript.articlenum
- e36
- local.article.journaltitle
- Weed Technology
- local.article.journalvolume
- 38
- local.pagination
- 9 pages
- local.peerreview - en
- Yes
- local.peerreview - fr
- Oui
Download(s)
Original bundle
1 - 1 of 1
Name: GlyphosateResistantSusceptibleDownyBromeManagementSoilAppliedResidualHerbicides_2024.pdf
Size: 273.38 KB
Format: PDF
Collection(s)