What are our emerging weed problems?

Page last updated: Thursday, 12 July 2018 - 8:15am

Please note: This content may be out of date and is currently under review.

Western Australia has seen major changes to the agronomic system, including a drying climate, more intensive cropping rotations and the widespread adoption of no-till. This has changed the distribution and frequency of many weed species. Weeds that have become increasingly problamatic in crop or over the summer fallow include Afghan melon, barley grass, brome grass, button grass, caltrop, doublegee, roly poly, sowthistle, windmill grass and wireweed.

This research aims to assess the growth of problem weeds in the current cropping system. By assessing emergence, weed seed production, seed shedding and seed dispersal, the population growth rate of each species will be assessed. Control strategies will be updated, based on a more accurate understanding of the biology and ecology of each species.

Table 1 Trial details
Site Wongan Hills Research Station
Season 2016-2019
Treatments
  1. Afghan melon
  2. Barley grass
  3. Brome grass
  4. Button grass
  5. Caltrop
  6. Doublegee
  7. Roly poly
  8. Sowthistle
  9. Windmill grass
  10. Wireweed

Weed seeds spread at a rate of 100 seeds/m2 (1380 seeds per plot).

Crop Wheat: Zippy at 80kg/ha
Fertiliser MacroProPlus at 80kg/ha
Herbicide Non-selective knockdown herbicide

Contact information

Author

Catherine Borger

Regions