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Summer weeds can rob subsequent crops of soil nitrogen and stored soil water. They can also reduce crop emergence by causing physical and/or chemical interfence at seeding time.
Some aquatic plants used in ponds and aquariums are highly invasive and have become serious weeds in natural waterways.
In an integrated weed management program, control of weeds should occur in the fallow, pre-sowing, early post-emergent and in pasture phases.
Introducing new plants to an area can have positive and negative effects on the environment, economy and community.
High priority invasive species are defined in the Invasive Species Plan for Western Australia as high risk species that can establish widely, and if so cause the most undesirable impact.
Preventing weed seed set provides an opportunity to control weed seed set in the pasture, late fallow, late stubble and in-crop phases.
This management strategy provides an opportunity to control weed seed set in the pasture and during harvest.
‘Risk-aware’ growers can implement strategies to reduce and avoid unnecessary introduction and spread of weeds.
Oats are more competitive with weeds than most other crops but weed control is still critical, particularly in hay crops as weeds can cause downgrading or rejection of export hay.
A list containing links to descriptions and chemical controls for declared plants and a calendar of operation for declared and other trouble plants.