Brome Grass

Brome grass is an annual grass weed widely distributed across the wheatbelt of southern Australia. In crops and pastures this highly competitive weed can markedly reduce productivity with seeds contaminating grain samples and causing injury to livestock. Brome grass competing early in wheat at a density of 100 plants per square metre can reduce yields by as much as 30 to 50 per cent.

Key Points

  • Brome grass can be a serious weed and is found across low and high rainfall cropping regions.
  • Brome grass is becoming an increasing problem. this is due to higher intensity of cropping in rotations, reduced tillage and the absence of effective herbicides for its control in cereals.
  • Bromus diandrus and B. rigidus are the two most common species; both showing a more protracted and staggered germination pattern allowing them to evade effective presowing control with knockdown herbicides.
  • Control is achieved in break crops and by growing wheat varieties tolerant to imidazolione herbicides (Clearfield®).
  • Aim for two consecutive years of control to deplete the seedbank of this troublesome weed.

Region South, West, North