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Silver grass is an annual grass occurring in both cropping and grazing regions across Australia. There are several species, the most common being Vulpia myuros and V. bromoides.
Herbicide resistance is the inherited ability of an individual plant to survive a herbicide application that would kill a normal population of the same species.
Annual ryegrass (Lolium rigidum) is one of the most serious and costly weeds of annual winter cropping systems in southern Australia.
In-crop weed competition causes losses costing around $1 billion per annum for Western Australia.
The most accurate way to estimate the weed population of a paddock is to count the number of plants in an area of known size at a number of locations.
In Western Australia, competition from 7-90 capeweed plants per square metre in a wheat crop can reduce crop yield by 28-44% and net return by 25-76%.
Barley grass is a common name for Hordeum glaucum and H. leporinum.