Crop weeds

Weeds are estimated to cost Australian agriculture more than $2.5 billion per year. Understanding weeds and the various methods to control them ultimately reduces costs and improves productivity.

The Department of Primary Industries and Regional Development conducts research into the management of weeds and has developed integrated weed management (IWM) packages, that incorporate a number of varied weed control options, including chemical, physical and biological strategies, are vital for sustainable weed management in this state.

Weed populations that have developed herbicide resistance, where standard herbicide treatments are no longer effective, pose an increasing threat to WA's agricultural production.

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Articles

  • A subclover and barleygrass pasture that has been spray-topped on the right hand side

    Effect of spray-topping on pasture legumes

    28 July 2014

    Spray-topping is a very effective method for managing annual grass seed set in pastures.

  • Capeweed flower head

    Capeweed reduces crop yield

    4 February 2011

    In Western Australia, competition from 7-90 capeweed plants per square metre in a wheat crop can reduce crop yield by 28-44% and net return by 25-76%.

  • Barley grass heads

    Barley grass

    3 February 2011

    Barley grass is a common name for Hordeum glaucum and H. leporinum.

  • Martin Harries kneeling in a wheat crop

    Focus paddocks 2014 trial report

    18 September 2014

    Management of weeds, disease and nitrogen nutrition are ongoing challenges that limit yield potential.

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