"Today, one bottle of wine exported in five is made in Italy, the biggest wine exporter in the world," Italy's Coldiretti agricultural association said in a statement.
The country exported a record €5.0 billion worth, a 575-percent increase over 30 years, it said in the study, which examined how the sector had recovered following a 1986 methanol scandal.
The addition of wood spirits to table wine by a family business which wanted to increase the alcohol level of a poor batch had left 23 people dead and dozens of others poisoned, some suffering blindness or neurological damage.
"The image of Made in Italy foodstuffs was dramatically compromised across the world, but it was also a chance for a new start with a revolution which saw Italian wine set out to conquer first place" on the international stage, the association said.
The leap in safeguards and quality saw an increase in designations as well: 66 percent of bottles of wine exported are now classified with the quality assurance labels DOC, DOCG or IGT.
The number one consumer of Italian wine is the United States, which imported €1.3 billion worth in 2015, up 13 percent from 2014, pushing Germany into second place, with Britain ranking third, Coldiretti said.
The appetite for Chiantis and Barolos continues to grow in China, which imported €80 million worth of Italian wine, up 18 percent on 2014, while the market in Japan grew 2.0 percent on the previous year.
In October, the International Organisation of Wine (OIV) brought tears to French eyes by announcing that Italy had overtaken France to become the largest producer of wine.
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