After spending big $ on Rootworm corn last year, long story short, none was purchased this year on our farm.   We do put regent in with some popup.

Corn borer protection seems to be more important as we seem to no longer have "hatches" or "broods", more of a slow long term evolution that turned some RR RW feilds (non BT (corn borer)) into an extremely week stalk mess!

Good Luck