Management options for preventing weed seed-set
Pasture spray-topping is used to prevent the domination of annual weeds (predominantly grasses) in medium-term (phase) pasture systems.
Renovation crops and pastures
These include green manuring, brown manuring, mulching and hay freezing and can be used to return crops and pastures to the soil to improve soil fertility, reduce weed burdens and increase soil organic matter.
Silage and hay
Both silage and hay production of crops and pasture can reduce the seed set of target weeds and remove viable weed seeds.
In-crop weed management for seed set control
This includes spray-topping with selective and non-selective herbicides, dessication and windrowing (swathing) to minimise the replenishment of seedbanks and/or reduce grain contamination.
By actively managing weeds in pastures by varying grazing management techniques will maintain a balance of pasture species to maximise desirable legumes and grasses while keeping weed levels low.