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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.
In 2021 the Department is conducting over 300 research trials across the state from Kununurra in the north to Esperance in the south.
Brome grasses (Bromus spp.) are highly competitive weeds, most problematic in wheat crops.
Windmill grass (Chloris truncata) is a native species and is the tenth most common summer weed species in the Western Australian wheatbelt.
‘Risk-aware’ growers can implement strategies to reduce and avoid unnecessary introduction and spread of weeds.
Annual ryegrass (Lolium rigidum) is one of the most serious and costly weeds of annual winter cropping systems in southern Australia.
This project aims to determine the spread of emerging summer weeds and deliver new knowledge on the biology and management of these emerging summer and winter weeds, with an overall aim of increasi
The viability of annual ryegrass seed can be reduced substantially by desiccation, pre-harvest spraying or swathing of canola depending on the product and timing.
Testing for herbicide susceptibility allows you to determine what herbicide options are still available to control weeds on your farm.
An 11 year study showed that narrow row spacing and harvest weed seed destruction (that is, residue burning each autumn) reduced annual ryegrass seed production.