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

  • Bromus diandrus infestation in a mature crop

    Management of brome grass

    20 March 2014

    Brome grasses (Bromus spp.) are highly competitive weeds, most problematic in wheat crops.

  • Live and senesced lesser broomrape in a pasture

    Lesser broomrape

    19 November 2021

    Lesser broomrape is the species Orobanche minor. It is an increasingly common weed of pasture and occasionally oat and hay crops. It is also a common garden weed.

  • Summer fallow spray

    Herbicides

    18 January 2011

    Herbicides play a vital role in integrated weed management programs.

  • Feathertop Rhodes grass in sorghum

    Weed Seed Wizard details

    15 August 2012

    The Weed Seed Wizard is a computer simulation tool that uses paddock management information to predict weed emergence and crop losses.

  • Lesser loosestrife in flower

    Loosestrife - plant toxin affecting sheep and cattle

    12 November 2014

    Hyssop loosestrife (Lythrum hyssopifolia) is a widely distributed weed in the south west of Western Australia.

  • Flaxleaf fleabane on the south coast of WA

    Summer weeds

    17 January 2014

    Summer weeds can rob subsequent crops of soil nitrogen and stored soil water. They can also reduce crop emergence by causing physical and/or chemical interference at seeding time.

  • Harvest

    Crop weeds: Hygiene - prevent weed seed introduction

    29 May 2012

    ‘Risk-aware’ growers can implement strategies to reduce and avoid unnecessary introduction and spread of weeds.

  • Salsola (prickly saltwort, rolypoly)

    Improving control of summer weeds

    11 February 2015

    Summer weeds can rob subsequent crops of soil nitrogen and stored soil water. They can also reduce crop emergence by causing physical and/or chemical interference at seeding time.

  • Barnyard grass

    Weed Seed Wizard scenarios

    15 August 2012

    Different weed management options can be explored using the Weed Seed Wizard.

  • Alex Douglas and Kevin Walsh in the paddock with the Weed Seed Wizard

    Weed Seed Wizard case studies

    15 August 2012

    The Weed Seed Wizard is a computer simulation tool that helps you understand and manage weed seedbanks on your farm.

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