Thanks so much - all. Don't feel bad terrafirma...... but my trees are in about 5 years old and when most leaves are affected they get near death.
They were coming back healthy and have fruit - until a few days ago. I hate to spray and won'y use systemic while fruiting so....
I'll try the neem oil on the newer leaves - and selective leaf removal.
I throw the affected leaves away. I think I read that you can crush the trails and leave the leaf. Does anyone know about that? Can you pinch the life out of those little suckers?
Maybe cut the part with trails and leave the rest of the leaf? - like I have nothing else to do?
I'll report back.