Liquidambar Leaf necrosis?

[Arborowen]

Hi all.

 

Could anyone comment on the attached leaf scan below?

 

It's a semi-mature tree planted roughly 10 years ago, in what, (based on the clients lengthy and detailed description), sounds like a very well constructed and fertilised planting pit within a chalk escarpment. the area is well draining and if anything i think there my be a lack of water. The housing estate was build on rubble and many of the woody plants appear to be struggling.

 

What I was hoping to pin point is if this was a sign of stress? either water stress of some other nutrient deficiency causing the leaves to become mottled in this way.

 

Looking forward to your thoughts.

 

O

[Jesse]

Leaf miner damage. ??

[Arborowen]

I'm not sure I have ever come across leaf minor on sweet gum before I know there is one that effects it. The area affected does not cover the entire tree its a area just offset from the leader. It's also resulted in slightly stunted growth of leaves and shoots on the effected branches.