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In 2022, the department is conducting more than 300 research trials across the state from Kununurra in the north to Esperance in the south.
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.
Pasture manipulation is the application of herbicides for grass control early in the growing season (autumn or early winter).
It is often the preferred option for grass control.