Ferguson charged over referee jibe
In a post-match interview Ferguson accused Wiley of not being fit enough although he did apologise for causing Wiley "any personal embarrassment" a week later in a statement issued by the the club.
In his statement Ferguson said he had merely been trying to highlight an important issue in the game.
"My only intention in speaking publicly, was to highlight what I believe to be a serious and important issue in the game, namely that fitness levels of the referees must match the ever-increasing demands of the modern game," he said.
The FA said Ferguson has until November 3 to respond to the charge.