The main culprit, Mr. Martinson said, was an American grape louse called phylloxera, which devoured the unaccustomed roots.
From the post-gazette.com
Phylloxera can be stymied by regrafting grape buds onto resistant varieties of rootstock.
From the time.com
This is common practice because North American grape species are resistant to phylloxera, a root louse that eventually kills the vine.
From the en.wikipedia.org
Nurseries graft European vines onto native North American grape plant roots, which are naturally resistant to phylloxera.
From the sfgate.com
Baco is unique, a cross between Folle Blanche and the American grape Noah, created in 1898 in response to the 19th-century phylloxera scourge that killed off so many French vines.
From the washingtonpost.com
The island escaped the 19th century phylloxera epidemic that ravaged vineyards and erased countless grape varieties on continental Europe, and thus boasts vines up to 500 years old.
From the time.com
The decimation of the region's vineyards gave the opportunity for vine growers to replant with phylloxera resistant rootstock and in more ideal locations for quality grape production.