Leaf fungus - please, help!

[Moxie]

Hi does anyone know how to treat this? (((

 

[Eckhoffw]

Looks like Galls to me.

Plant Galls | The Morton Arboretum

Galls are abnormal growths that occur on leaves, twigs, roots, or flowers of many plants. Most galls are caused by irritation and/or stimulation of plant cells due to feeding or egg-laying by insects such as aphids, midges, wasps, or mites.

mortonarb.org

 

[Wires_Guy_wires]

I've had these kind of galls in a grapevine for over a decade. They were caused by some sort of mite.
A proper miticide will probably kill the bad guys. But I have no idea what a proper miticide would be.