Getting rid of Bahia grass on athletic fields?

Question:I cut 7 athletic fields at my local high school with a Jacobsen Reel Mower and I was wondering is there a way to get rid of patches of bahia grass in them. Reel mowers don't cut high grass and bahia grass is just annoying and doesn't belong on an athletic field.

Answers:
You will need to spray the bahia grass with roundup, then when it is gone, reseed.