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 Agriculture and Food, Western Australia 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 Western Australia's agricultural production.

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.

  • 10 August 2016

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

  • 15 November 2016

    One-off soil inversion results in the complete burial of the water repellent topsoil in a layer typically at a depth of 15-35cm, and brings to the surface a layer of wettable subsoil.

  • 9 December 2016

    Herbicides play a vital role in integrated weed management programs.

  • 9 December 2016

    Herbicides can be applied by a variety of means including boom sprayers, aerial spraying, misters, blanket wipers, rope wick applicators, weed seekers and back-pack sprayers.

  • 9 December 2016

    Annual ryegrass (Lolium rigidum) is one of the most serious and costly weeds of annual winter cropping systems in southern Australia.

  • 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%.

  • 25 October 2016

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

  • 1 August 2016

    Herbicide resistance is the inherited ability of an individual plant to survive a herbicide application that would kill a normal population of the same species.

  • 9 December 2016

    Windmill grass (Chloris truncata) is a native species and is the tenth most common summer weed species in the Western Australian wheatbelt.

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