So I saw one of these in the vineyard last year. Which means my vines probably have the larvae in the roots. There isn’t a safe insecticide to control them so I’ve used predatory nematodes last year but have no idea if they will be effective so this year I’m going to put landscape fabric around the base of all my vines and see if that will trap the larvae as they emerge and hopefully keep them from getting into the root zone when they hatch. They can be quite devastating hopefully this will work. I never realized how many bugs live off my grapes.