The Labour Party says John Key needs to assert the rights of Kiwi exporters when he meets Australian Prime Minister Tony Abbot this week as a vigorous "Buy Australia" campaign threatens their livelihoods.
Two major Australian supermarket chains, Coles and Woolworths, have decided to stop selling New Zealand goods, primarily vegetables, as they opt for an "Australian made" focus by solely contracting domestic suppliers.
Mr Key has expressed concern about the campaign and has said he would raise it with Mr Abbott on his three day visit to Australia, which begins today.
Labour's trade spokesman Phil Goff accused Australia of breaching its obligations under the Closer Economic Relations (CER) free trade agreement and said the campaign was a "fundamental threat" to New Zealand's exporters.
"With the two companies [Coles and Woolworths] having a retail share of 80 per cent of the Australian market this substantially stops New Zealand exporters from getting vegetables to the Australian consumer.