Malcolm Turnbull’s son has entered the election campaign in the final 72 hours, urging voters to dump health minister Greg Hunt, and essentially back former Liberal Julia Banks.

Alex Turnbull recorded a robocall for activist group GetUp!, which was made to homes in the Flinders electorate, south-east of Melbourne last night.

In the call made to 17,000 phones, he criticised Mr Hunt for backing Peter Dutton in the leadership coup, helping to oust Mr Turnbull’s father from the top job.

And he criticised the Liberal Party’s stance on dealing with climate change.

“We need more people who want action on climate change. This election don’t give the Libs your vote,” he said in the recorded message.

YOU CAN LISTEN TO THE FULL CALL AT THE TOP OF THE PAGE

Ms Banks is running part of her campaign on the issue of tackling climate change.

9News also understands GetUp! has been distributing how to vote cards in the electorate with Ms Banks, at number 1.

Alex Turnbull’s intervention comes a month after 9News revealed he had helped organise financial support to set-up Ms Banks’ campaign website.

Ms Banks, who was the member for Chisholm, is running as an independent against Mr Hunt.