The First Cases of Evolving Glyphosate Resistance in UK Poverty Brome (<i>Bromus sterilis</i>) Populations

Davies, Laura R.; Hull, Richard T.; Moss, S. R.; Neve, Paul

doi:10.1017/wsc.2018.61

Cited by 26 publications

(29 citation statements)

References 27 publications

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“…Hull et al [7] tested the susceptibility of nine V. myuros populations from Denmark and the UK to three residual herbicides, flufenacet, pendimethalin and prosulfocarb with different sites of action, and found no indication of resistance. Because of the natural resistance to ACCase and ALS inhibitors, glyphosate application in between crops has become an integrated part of strategy to control V. myuros and this may result in the evolution of resistance to glyphosate, as has been observed for Bromus sterilis (L.) in the UK [70].…”

Section: Weed Resistancementioning

confidence: 99%

Biology and Management of Vulpia myuros—An Emerging Weed Problem in No-Till Cropping Systems in Europe

Akhter

Jensen

Mathiassen

et al. 2020

Plants

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Recently, Vulpia myuros has become a problematic grass weed species in parts of Europe. It is most common in no-till cropping systems. The inherent tolerance to several selective grass weed herbicides is of serious concern to the successful management of V. myuros in arable farming. Here, we reviewed the available knowledge about the biology of V. myuros to identify knowledge gaps and assess management efforts to identify best practices for control. V. myuros is a winter-annual species producing seeds with a short dormancy that can germinate at a wide range of conditions. Seed longevity in the soil is short. Little information is available on the influence of V. myuros on crop yield but some results suggest that yield losses can be significant. The findings provide a better understanding of the weedy characteristics of V. myuros and highlight that management strategies in Europe need to be diversified and integrate preventive and cultural control methods. Finally, we identify some of the management tools that should be considered to minimize the impact of V. myuros on European farming and future needs for research to develop sustainable integrated weed management strategies.

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Section: Weed Resistancementioning

confidence: 99%

Biology and Management of Vulpia myuros—An Emerging Weed Problem in No-Till Cropping Systems in Europe

Akhter

Jensen

Mathiassen

et al. 2020

Plants

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“…When treated with 360 g ha −1 glyphosate, fresh biomass was reduced by >79% for all populations tested, except for two A. sterilis populations (SD0464 and SD0224). The population SD0464, a population with known reduced sensitivity to glyphosate (coded 09D118 in Davies et al …”

Section: Resultsmentioning

confidence: 99%

“…This demonstrates that growers can still use other herbicide modes of action to control ALS‐resistant populations in diverse cropping systems. Collectively, the detection of ALS herbicide‐resistant brome populations in the UK, together with the development of ACCase‐ and glyphosate‐resistant brome populations globally, and populations in the UK showing reduced glyphosate sensitivity, should alert UK growers to the risk of rapid herbicide resistance evolution to other modes of action in UK bromes.…”

Section: Discussionmentioning

confidence: 99%

“…In addition, populations of A. sterilis resistant to ACCase‐ and ALS‐inhibiting herbicides have been reported in Germany and France, along with B. secalinus resistance to ALS‐inhibitors in the USA . Recently, increased tolerance to glyphosate has been reported in populations of A. sterilis in the UK . These trends highlight the need for vigilant monitoring of brome weed populations due to their propensity towards evolving herbicide resistance.…”

Section: Introductionmentioning

confidence: 99%

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Detection and characterization of resistance to acetolactate synthase inhibiting herbicides in Anisantha and Bromus species in the United Kingdom

Davies

Onkokesung

Brazier-Hicks

et al. 2020

Pest Management Science

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BACKGROUND: Anisantha and Bromus spp. are widespread and difficult to control, potentially due to the evolution of herbicide resistance. In this study, UK populations of four brome species have been tested for the early development of resistance to acetolactate synthase (ALS)-inhibiting herbicides commonly used in their control.RESULTS: Glasshouse assays confirmed reduced sensitivity to ALS-inhibiting herbicides in single populations of A. diandra, B. commutatus and B. secalinus, and in three populations of A. sterilis. By contrast, all 60 brome populations tested were sensitive to the ACCase-inhibiting herbicide propaquizafop and glyphosate. Dose-response with two ALS herbicides showed broad-ranging resistance in the A. diandra, A. sterilis and B. commutatus populations. In the B. commutatus population, this was associated with a point mutation in the ALS enzyme conferring target site resistance (TSR). Additionally, resistant populations of A. sterilis and B. commutatus populations contained enhanced amounts of an orthologue of the glutathione transferase phi (F) class 1 (GSTF1) protein, a functional biomarker of nontarget site resistance (NTSR) in Alopecurus myosuroides. There was further evidence of NTSR as these plants also demonstrated an enhanced capacity to detoxify herbicides.CONCLUSION: This study confirms the evolution of resistance to ALS inhibiting herbicides in brome species in the UK by mechanisms consistent with the evolution of both TSR and NTSR. These findings point to the need for increased vigilance in detecting and mitigating against the evolution of herbicide resistance in brome species in Northern Europe.

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“…The identification of a first shift in susceptibility is particularly valuable when resistance evolution is rather slow, as in glyphosate resistance. Only a few herbicide sensitivity analyses are available in the literature [23][24][25][26]. The European and Mediterranean Plant Protection Organization defines the baseline as the mean of natural variability of a target species' sensitivity before the commercial introduction of an active ingredient and can be taken as a point of reference to be used in decision-making processes.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity Analysis of Italian Lolium spp. to Glyphosate in Agricultural Environments

Panozzo

Collavo

Sattin

2020

Plants

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Empirical observations generally indicate a shifting and decreased Lolium spp. susceptibility to glyphosate in Italy. This is likely due to the long history of glyphosate use and to the sub-lethal doses commonly used. There is, therefore, a need to determine the variability of response of Lolium spp. to glyphosate and identify the optimum field dose. To perform a sensitivity analysis on Lolium spp. populations in an agriculture area, collection sites were mainly chosen where glyphosate had not been applied intensely. Known glyphosate-resistant or in-shifting populations were included. Two outdoor dose-response pot experiments, including eleven doses of glyphosate, were conducted. The dose to control at least 93%–95% of susceptible Lolium spp. was around 450 g a.e. ha−1. However, to preserve its efficacy in the long term, it would be desirable not to have survivors, and this was reached at a glyphosate dose of 560 ± 88 g a.e. ha−1. Taking into account the variability of response among populations, it was established that the optimal dose of glyphosate to control Lolium spp. in Italy up to the stage BBCH 21 has to be at least 700 g a.e. ha−1. As a consequence, it is recommended to increase the label recommended field rate for Lolium spp. control in Italy to a minimum of 720 g a.e. ha−1.

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The First Cases of Evolving Glyphosate Resistance in UK Poverty Brome (Bromus sterilis) Populations

Cited by 26 publications

References 27 publications

Biology and Management of Vulpia myuros—An Emerging Weed Problem in No-Till Cropping Systems in Europe

Biology and Management of Vulpia myuros—An Emerging Weed Problem in No-Till Cropping Systems in Europe

Detection and characterization of resistance to acetolactate synthase inhibiting herbicides in Anisantha and Bromus species in the United Kingdom

Sensitivity Analysis of Italian Lolium spp. to Glyphosate in Agricultural Environments

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