Opposition Leader Mike Nahan has said he has been "black banned" by The West Australian and its reporters will not attend Liberal press conferences or include comments from shadow ministers in its stories.

Dr Nahan said his office had been told by the newspaper it would not be providing the Opposition with any "vehicles for us to communicate" after he said in a Liberal party conference speech on Sunday that voters in the Darling Range byelection were not listening to traditional media.

But he denied the speech was meant as a criticism of the state's only daily newspaper.

"It wasn't an attack on The West Australian, it was me telling my Liberal colleagues that in the future, if we're going to duplicate Darling Range, we're going to have to go more grassroots, social media and door knocking," he said.