A television viewer noticed the infraction, which occurred on the eighth green at Lake Malaraen during Dyson's second round, and rules officials met with Dyson the next morning.
He was tied for second, four shots off the lead. Dyson was disqualified for not adding the two-shot penalty to his scorecard.
Dyson, a six-time winner on the European Tour, said in a statement released five days after the incident that the violation was unintentional. The maximum sanction was expulsion from the tour.
Dyson returned to action at the start of the 2014 season in November, finishing tied for 52nd in the South African Open and then tied for third in the Alfred Dunhill Championship last week.