Approximately 6 million people visit the Napa Valley every year, primarily to enjoy its wineries, restaurants, and natural beauty. If the wine grape industry were to disappear as a result of the Glassy-Winged Sharpshooter, there is no other sustainable agricultural commodity that could take its place. The only viable alternative would be large-scale development. Agriculture and tourist-supported industries would give way to high-tech business parks and housing developments, as in infested counties in Southern California and in the Silicon Valley. Everyone living in Napa County would feel the effect.