Labour's water tax policy announced earlier this week is being described by some winegrowers as dangerous and deceitful.
If elected, the party plans to charge farmers and horticulturalists for their water use, and use the money to improve the water quality of our lakes and rivers.
The Marlborough region produces 79 percent of our entire grape harvest.
Simon Bishell, deputy chair of the Wine Marlborough Board, spoke to Duncan Garner.
Watch the video for the full interview.