Silver Grass Yields increase with silver grass control in cereals have not always been reported. If the weed germinates at or before the crop, and the season finished well, substantial crop losses can be expected. The previous seasons lupin cop was reported to be clean, but the wheat crop prior to that was dirty. Sufficient seed must have either carried over from the previous wheat crop, as well as the potential of a low level of seed set in the previous lupin crop to allow for this to occur. While silver grass seed appears to germinate rapidly, there have been measurements of low but significant amounts of seed persisting for more than on season.
Care is needed to prevent the build up of that species.