The United States is now the fourth-largest producer of wine worldwide, with an abundance of grapevines planted in many wi… ne regions, though Californian accounts for almost 90% of the country's output. In the late 1800s, the root louse phylloxera decimated many of the vineyards in Europe. It originated in the soils of North America where the vines are naturally resistant and was transferred to Europe on vine cuttings. In this case, North America was both the cause of the problem, and the solutio