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

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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

SLIDE 1

Investigating the distribution and presence, and potential for herbicide resistance of UK brome species in arable farming

SLIDE 2

Introduction

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

5 main arable brome species in UK, last full survey in 1989
ALS, ACCase and glyphosate resistant populations outside UK

Anisantha diandra Anisantha sterilis Bromus commutatus Bromus secalinus Bromus hordeaceus

SLIDE 3

Survey results

Anisantha Bromus

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

SLIDE 4

ALS herbicide screen results

Mesosulfuron & Iodosulfuron Pyroxsulam

A. diandra

Mesosulfuron & Iodosulfuron

B. secalinus

Pyroxsulam Mesosulfuron & Iodosulfuron Pyroxsulam Mesosulfuron & Iodosulfuron Pyroxsulam

A. sterilis
B. commutatus

Fresh weight Brome species and herbicide treatment

SLIDE 5

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