(NewstalkZB‎) - The traditional view that hand picking of grapes is needed to produce the best wine is being challenged by Auckland University research. It shows that machine harvesting produces higher levels of the aromas characteristic of award-winning New Zealand Sauvignon Blanc. Associate Professor Paul Kilmartin is presenting his findings in the United States today. "There's always been the issue that perhaps the best wines need to be made only from hand-picked grape and it's very hard to do this on a large harvesting scale.