Controversy erupts on final day of campaigning in South Australia by-election

Controversy has marred the final day of campaigning in the Black by-election in South Australia, with the electoral commissioner stepping in over a dubious campaign ad.

Meanwhile, a public war of words erupted between Liberal MP Ben Hood and Labor's by-election candidate, Alex Dighton, at a pre-polling centre in Hallet Cove.

The confrontation unfolded when Dighton accused Liberal candidate Amanda Wilson of misleading voters about Labor's funding plans for the Hallet Cove pool. 

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"Mr Dighton told me I was lying when I said Labor wasn't going to fund it and then that turned into an altercation... ultimately he was bullying and harrassing and intimidating me," Hood claimed.

Dighton has denied those accusations.

"I was talking to (Wilson) about the fact that she was telling things that weren't true to voters and I don't think that's fair to the voters," he said.

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Adding to the controversial day, the electoral commissioner found the Liberal Party's claim in election ads that state government fees and charges are up 30 per cent under Labor breached the electoral act.

The commissioner described the statement as "misleading" and asked it be "withdrawn from further publication".

A quarter of registered voters in the seat of Black have already cast their ballot either via the post or at pre-polling stations. 

The rest will need to have their say before polls close at 6pm on Saturday.

This article was produced with the assistance of 9ExPress.