Weeds

Weeds pose a serious risk for primary producers as they can impact on market access and agricultural production.

In 2006/07, each Western Australian agricultural business spent an average of $29 376 ($341 million total) on weed control (Australian Bureau of Statistics).

Weed control is a shared responsibility between landholders, grower groups, biosecurity groups and the Department of Agriculture and Food, Western Australia (DAFWA).

To protect Western Australia’s agriculture DAFWA:

  • works with landholders, grower groups, community groups and biosecurity groups.
  • regulates weeds under the Biosecurity and Agriculture Management Act 2007.
  • provides a weed identification service.
  • provides a predictive simulation tool called weed seed wizard.
  • provides information on weed control, crop weeds, regulated/declared plants and herbicides.
  • contributes to social science through weedwatcher.

If you need advice on weeds please search our website, Western Australian Organism List or contact our Pest and Disease Information Service (PaDIS).

For diagnostic services, please contact our AGWEST Plant Laboratories.

Articles

  • 23 May 2016

    The most accurate way to estimate the weed population of a paddock is to count the number of plants in an area of known size at a number of locations.

  • 15 March 2016

    One method of weed control is to remove weed seeds in the fallow, stubble and pre-sowing phase.

  • 16 March 2016

    In an integrated weed management program, control of weeds should occur in the fallow, pre-sowing, early post-emergent and in pasture phases.

  • 31 March 2016

    This management strategy provides an opportunity to control weed seed set in the pasture and during harvest.

  • 10 August 2016

    In-crop weed competition causes losses costing around $1 billion per annum for Western Australia.

  • 14 March 2016

    Integrated weed management (IWM) is a system for managing weeds over the long term, and is particularly useful for managing and minimising herbicide resistance.

  • 23 May 2016

    In Western Australia, competition from seven to ninety capeweed plants per square metre in a wheat crop can reduce crop yield by 28-44% and net return by 25-76%.

  • 14 March 2016

    Herbicide performance can vary greatly depending on a number of factors. These can include compatibility of herbicides, water quality, sprayer decontamination and controlling stressed weeds.

  • 15 March 2016

    Brome grass (Bromus diandrus and B. rigidus) is one of the most competitive grass weeds in wheat.

  • 8 April 2016

    Doublegee or spiny emex is a significant weed in Western Australia. It is a vigorous annual herb with a strong tap root and a long, fleshy, hairless stem.

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