There are small protrusions on the leaves of grapes. What happened? (for example)

Hello! Judging from the symptoms of grape leaves in the photos, it is grape felting disease, which is a kind of damage to leaves by gall mites. This is the initial stage of the damage. In the future, the small pimples on the leaves will be bigger, and mites will breed in the galls. It is necessary to spray acaricide with 2000 times of silicone to enhance the penetration and make mites be eliminated by galls.