How to beat and treat some common grape pests and diseases. That’s coming up on This Land of Ours. There are quite a few pests who like to munch on grapes just as much as we humans do. Some of the common pests you might find, include: Japanese Beetles, Black Vine Weevils, Grape Cane Girdlers, Grape Mealybugs, and Grassy Winged …