I'm currently reading The Botanist and the Vintner which tells the story of how phylloxera nearly wiped out the vineyards of Europe and how it was eventually defeated. While the life cycle of the bug is a bit of a chore to follow, generally, the book is surprisingly compelling.
It strikes me as somewhat curious that, apparently, in 19th century France, to describe a wine as tasting of blackcurrant was not very flattering. Here's what some people thought about the taste of American grapes: If these foreigners should invade the Champagne, of Burgundy and of Bordeaux - Oh desecration! These glorious products warmed by the French sun will be sacrificed to hideous brews tasting of blackcurrant or bedbug. Aside from this, there is at least one other passage that makes clear that wines tasting of blackcurrant were less than desireable.
Nowadays, for Cabernet Sauvignon based wines, anyway, you almost expect blackcurrant to show up somewhere in the tasting note. Funny how fashions change.