Mr Joyce took time out from electioneering in his own seat at the start of the final week of the campaign to attend the Wodonga pre-poll centre on Monday with Nationals candidate Marty Corboy following a stop-off at Beechworth Honey.

He was greeted by Ms McGowan before she stood within earshot of his press conference.

Mr Joyce said her actions proved she was concerned about the election outcome on Saturday.

"When someone tries to come in from the blind-side at a press conference it is a sign they are nervous," he said.

"The first thing Ms McGowan has to do is answer a very, very, serious question and that is if we have a hung parliament who is she going to support?

"If you can't be straight up and down about the most basic question, then where do we start believing her?"

Ms McGowan said Mr Joyce's presence in Wodonga was an indication the Indi result was resting on a knife-edge and would be decided on preferences again.

"It would be nice to think it was all over and done with on Saturday, but I think we will be here on Monday and Tuesday doing the final counting," she said.

"Indi is on the map, money continues to flow and the Deputy Prime Minister is here.

"He should be home campaigning because it is very close in New England."

Ms McGowan had hoped to raise his party's commitment to higher education, health and manufacturing with Mr Joyce, but he proceeded to meet and greet National Party volunteers at the pre-poll centre.

Mr Joyce agreed there was "real competition" in Indi between Mr Corboy, Ms McGowan and Sophie Mirabella.

"Marty Corboy is part of the party whose sole job is to look after regional people in a form that is sincere and truly delivers," he said.

"It is no good being the biggest hit in the coffee shop, it is no good being the voice in the wilderness, it is no good being the fighter who talks about things, the complaints desk, the suggestion box."

Beechworth Honey is the first company in Australia to utilise the country-of-origin labelling.