Grapes

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2 Jul 2011
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Any type of grape, especially the black variety seem to have a whitey coating of something on them.

Is this natural to the grape, or is it some horrible chemical thing added by humans?

Im extremely sensitive to pesticides in fruit, and can only eat organic or I suffer massively.

Do I now need to wash and wipe every grape that I eat, or is this white, waxy stuff natural?

Cheers.
 
It’s mostly harmless wax, says Kay Bogart, a winemaker who works in outreach for the University of California at Davis’s viticulture program. The grape plant produces it to protect the berries from moisture loss. It’s also often just plain old dust, adds Jim LaMar, a professor of wine sensory evaluation at California State University, Fresno. Until recently, winemakers believed the white stuff was yeasts, responsible for wine fermentation. Now they believe such yeasts are airborne. In any case, that white stuff isn’t pesticide residue. Which is not to say that there isn’t pesticide residue on the grape
 
There's a lot of it on sloes and if you see black grapes on vines you'll see they are heavily deposited in it :)
 
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