This is seen as a move to address the malpractices that have characterised previous elections.
The governors said they believe campaigning on issues will ensure victory for the party and help it defeat opposition candidates and parties.
The party leaders demanded the cancellation of the just concluded Osun State governorship election.
The battle for APC governorship ticket in Imo remained one of the most controversial this season.
Live coverage of the party primaries ahead of the 2019 general elections
Yekini Nabena, the acting National Publicity Secretary of the party, confirmed it in a statement on Monday.
There are at least 12 aspirants vying for the PDP ticket including ex-Vice President Atiku Abubakar, Senate President Bukola Saraki and Governor Aminu Tambuwal of Sokoto.
In a surprise press conference on the eve of the election, he slammed the military takeover and said that he was being mistreated by the government.