Attack of the bubble creatures!

[SueA]

Hi jxm, could be like Nicos says, just dying back as autumn approaches. Some vines have leaves which turn purple/red in autumn before falling. Looked at my outdoor one & odd leaves are totally yellow with brown crispy bits on-dying off but nothing to worry about just the changing season & the grapes look lovely & are ripening up.Attaching photo showing some of the grapes & 'crispy' leaf.

[Palustris]

Not much up on vines, but many plants leak sap like thatwhen attacked by biting pests, aphids etc. The sap then gets infected with various fungal organisms. Soot mould is the most common one. All the books say the same thing, spray with suitable fungicide, remove the worst leaves, reduce the humidity but increase water to the roots. Check carefully for pests, especially if you have already had trouble with RSM, vines are prone to attack by them.