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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.
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.
New technology and old-fashioned community spirit have come together to aid the control of the invasive weed water hyacinth (Eichhornia crassipes) in Western Australia’s South West.
As a result of wide-spread recent rains (August 2017), weeds are now emerging and becoming a challenge for growers to manage in paddocks with patchy crops, staggered emergence or no crop emergence.
Weeds sprayed with a sub-lethal dose of a phenoxy, hormone type herbicide appear to become more palatable to stock.
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.
Recommendations for the control of declared plants in Western Australia (WA).
A list containing links to descriptions and chemical controls for declared plants and a calendar of operation for declared and other trouble plants.