Many authorities agree that mowing, discing, or plowing is an effective method for controlling phragmites, such as: UNITED STATES FISH AND WILDLIFE SERVICE (Publication) (Maine) (New York), Maryland DNR, Minnesota DNR, and Rutgers University.

MDEQ Issues Phragmites Control Guide.
(Ignoring beach grooming as a proven and effective control method.)
MDEQ Press Release Announcing Phragmites Control Guide (52 KB)
MDEQ Phragmites Control Guide (6 MB)

Harmful Algal Blooms and Muck: What’s the Difference?
Harmful algal blooms and muck can be mistaken for each other simply because people may associate an algal bloom with either type. Click here for details.