Grapevine leaf problems

Perki

can someone give me some Idea what wrong with my grapevine, I not 100% sure what's wrong with it, I got an ideas but not unsure.

 

Logan

Can't tell if it's on all leaves it might be fertiliser on them or wrong feeding I don't really know

Perki

I mulch in mid - late April and applied Growmore, just started to give some tomato food last week. Give it fresh mulch today and a good watering.