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.

Articles

  • 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.

  • In poor growing seasons, crops may not be good enough to harvest.? Managers need to make some tough decisions, after assessing feed value for livestock, potential weed seed set, level of herbicide

  • In 2020 the Department is conducting over 300 Grains Research trials across the state from Kununurra in the north to Esperance in the south.

  • The Chemical weed control in canola bulletin has been produced by the Department of Primary Industries and Regional Development, with co-investment from the Grains Research and Development Corporat

  • 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 interfence at seeding time.

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

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

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

  • Following the extended dry conditions this autumn, weeds are now emerging and becoming a challenge for growers to manage in paddocks that may have patchy crops, crops with staggered emergence or no

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

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