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

Primary Industries Development 2023 Research Trials Map

22 January 2018

In 2023, the Department of Primary Industries and Regional Development (DPIRD) is conducting more than 250 research trials across the state.
Residual herbicides - carryover and behaviour in dry conditions

8 June 2018

The term 'residual' applies to a number of herbicides that have a long lasting activity in the soil. These herbicides are often applied directly to the soil prior to planting crops, pre-emergent.
Control of green bridge for pest and disease management

19 December 2013

In Western Australia's Mediterranean-type climate, the survival of pests and diseases over summer is often critical in determining pest outbreaks and disease epidemics in broadacre crops.
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.
Crop-topping pulse crops

28 July 2014

'Crop-topping' is the late application of herbicides to prevent weed seed-set.
Windmill grass

23 May 2012

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

6 October 2011

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

18 January 2011

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.
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%.
Crop weeds: weed management at harvest

29 May 2012

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