The city of Long Beach spends hundreds of thousands of dollars every winter cleaning up trash off their beaches – much of which is Arundo canes scoured from the LA and San Gabriel Rivers.

http://www.cal-ipc.org/ip/management/ipcw/pages/detailreport.cfm@usernumber=8&surveynumber=

You don’t have to remove the underground stems and roots to kill Arundo and one of the techniques that works well during the dry season is a cut and spray method. The question I have is whether or not the Army Corps now intends on getting out their with some herbicide to finish the job.

Here is a good summary of successful Arundo control techniques.

http://www.smslrwma.org/invasives/Arundo/controlmethods.html