Submitted to: Crop Management
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 7/25/2007
Publication Date: 9/24/2007
Citation: Bushman, B.S., Halse, R., Sedegui, M. 2007. Waxy Mannagrass is established in two Oregon counties. Crop Management doi:10.1094/CM-2007-20924-01-RS
Technical Abstract: During official regulatory testing of grass seed shipments bound for Australia, seeds of a Glyceria species were detected in shipments of annual ryegrass (Lolium multiflorum Lam.). According to existing scientific literature, seven of the 18 Glyceria species known to occur in North America are found in Oregon (1, 2). The majority of these species are considered noxious weeds by Biosecurity Australia, their national agency responsible for plant protection. Biosecurity Australia presently allows only G. declinata Breb. as a contaminant in grass seed shipments. Previously, this species was recorded only in Louisiana, New York, and California. This brief report shows the presence of G. declinata in Oregon.