Mealy bugs have long been pests of grapes but their impact is potentially greater than just causing physiologically damage and leaving a sticky frass susceptible to mildews all over developing fruit. They can also transmit disease, but the risk can be minimized by monitoring the vines on a regular schedule. The economic threshold for mealybugs in WA State expressed as average percentage of infested spurs per vineyard quadrant is $[$ Select $].$