Buy the 2015 Old Farmer's Almanac!
It isn't a bug that we get in It isn't a bug that we get in the Northeast. He should contact a vineyard in California that grows warm climate varieties such as Thompson Seedless. If he does have the infamous leaf hoppers, he's not going to like what the California folks have to tell him about getting rid of them.... or should I say... the difficulty in getting rid of them. You can refer folks to this website for additional help. from Virginia Carter

2015 Garden Calendar2015 Weather Watcher's Calendar2015 Recipes Calendar2015 Engagement Calendar 2015 Everyday Calendar2015 Country CalendarNew Year Cross StitchLobster Rope Doormats