presence, and potential for herbicide resistance of UK brome species - PowerPoint PPT Presentation

Mar 03, 2024 •193 likes •249 views

Investigating the distribution and presence, and potential for herbicide resistance of UK brome species in arable farming Introduction Bromus commutatus Anisantha diandra Bromus hordeaceus Anisantha sterilis Bromus secalinus 5 main

Investigating the distribution and presence, and potential for herbicide resistance of UK brome species in arable farming
Introduction Bromus commutatus Anisantha diandra Bromus hordeaceus Anisantha sterilis Bromus secalinus • 5 main arable brome species in UK, last full survey in 1989 • ALS, ACCase and glyphosate resistant populations outside UK Aims and objectives • Assess distribution of UK arable brome populations and understand how herbicide resistance may evolve 1. Survey UK farmers for the presence of bromes 2. Investigate range in herbicide sensitivity within and between brome species
Survey results • Bromes present across all UK cereal growing areas • Anisantha species more problematic than Bromus • Brome ID poor • 60% respondents reported an increase in presence of brome Anisantha Bromus
ALS herbicide screen results Fresh weight Pyroxsulam Mesosulfuron Mesosulfuron Mesosulfuron Pyroxsulam Mesosulfuron Pyroxsulam Pyroxsulam & Iodosulfuron & Iodosulfuron & Iodosulfuron & Iodosulfuron A. diandra A. sterilis B. commutatus B. secalinus Brome species and herbicide treatment
Summary and conclusions • Bromes are wide-spread in UK arable farming with populations present across all cereal growing areas • Herbicide control problems are developing • Less sensitive populations will be further studied in glasshouse dose-response tests

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