Wiregrass, hairgrass, North Africa grass, softbearded oat grass.
Description
Ventenata (Ventenata dubia (Leers) Durieu) is native to central and southern Europe, Asia, and Africa. Ventenata has established itself in a number of states in the United States and provinces in Canada. It is currently increasing its expansion across the Pacific Northwest and will continue to spread, particularly as a contaminant in grass seed.

Control Methods
Cultural
Prevention is always the preferred and most effective method of controlling invasive plant species, but when an invasive annual such as ventenata has already established, the strategy should be to reduce seed production. Mechanical and physical control methods are generally ineffective since the grass tends to bend rather than cut.
Mechanical
Ventenata can bind up and cause damage to harvesting equipment. Ventenata has very little nutritive value and has silica concentrations higher than most winter annual grasses other than medusahead, which in turn discourages grazing by wildlife and livestock.
Biological
There are no biological control agents for managing ventenata grass.
Chemical
Herbicides can be effective in the management of ventenata. Ventenata has shown resistance to glyphosate and sethoxydim (Weed Alert 2002). Research has been conducted in eastern Washington from 1997-2019 testing a multitude of herbicides for the management of ventenata. Research studies found that fall applications provided the greatest control of ventenata. Until recently, only one year of control could be obtained by using herbicides. The use of flufenacet/metribuzin provided variable control from year to year. The herbicide imazapic normally provides one year of control, however, injury (delayed heading, plant reduction) can occur to specific grass species. Triasulfuron, rimsulfuron, and sulfosulfuron can also provide effective control but control can be variable year to year. The most effective multi-year control can be with the use of the herbicide indaziflam.



