Lilac leaves

Burtsnest

Hi all. This odd marking has appeared on my lilac plant leaves over the past couple of days.  Would anyone happen to have any ideas what this could be? The plant is healthy enough.  Thanks in advance. 

Fran IOM

Can anyone help? @Burtsnest

fidgetbones

I think you have a leaf miner. Pick off affected leaves and burn them.

Burtsnest

Thank you so much @Franiom for picking this up for me.

@fidgetbones I really appreciate your reply. Thanks and I've taken your advice.  Leaves removed and bunt.

Fran IOM

Threads can often slip through if the right person isn't around to answer your query. So glad you got an answer  @Burtsnest