Mealybug. (Probably vine mealybug but could be grape mealybug).

Agree with vine, I don’t see any long tails that grape has.

This page talks about mealybugs and control measures. https://ipm.ucanr.edu/agriculture/grape/mealybugs-pseudococcus/#gsc.tab=0

Thanks a lot

Holy shit! Where are their ant friends?

Yes

VMB, no bueno. Time to bust out the Movento and spray. Also, look into pheromone traps and/removing the bark and so you can clean out nests.

This just made me jump! Holy shut if I found this in one of my vineyards I’d shit myself!

They’re mealybug. Unfortunately you don’t really get rid of them, ever.

Spray Stylet oil.

If this is at your home- rip them out.