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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 2020 the Department is conducting over 300 Grains Research trials across the state from Kununurra in the north to Esperance in the south.
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.
This management strategy provides an opportunity to control weed seed set in the pasture and during harvest.
Brome grasses (Bromus spp.) are highly competitive weeds, most problematic in wheat crops.
Wild radish (Raphanus raphanistrum) is highly competitive in crops and can cause a yield loss of 10-90%.
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.
Doublegee or spiny emex is a significant weed in Western Australia. It is a vigorous annual herb with a strong tap root and a long, fleshy, hairless stem.