"Steve" wrote in message
news:wYXKc.6478$Zr.5033@okepread01...
I live in Oklahoma and have U3 Bermuda. I have these rings on my lawn
after
cutting the grass. I raised the lawnmower blade on my push mower and the
rings are still there. Any ideas???? My blade is sharp. My wheels are
set
even.



It's a disease. Unfortunately I know nothing about U3 Bermuda or I would
attempt to help you with this one.

Peter H