Azalea leaves

Question

Some of my azalea leaves have been reduced to a lacework of veins, beginning early summer. Sprayed with pesticide to no avail. Not earwigs, and can’t see any creatures on or under the leaves. About one-eighth of a meter high plant affected. Advice would be appreciated.

Answer 1

I am not sure what this could be. Check whether the damage matches the photos in any of these articles:

https://www.gardeningknowhow.com/plant-problems/pests/insects/leaf-miner-control.htm
http://entnemdept.ufl.edu/creatures/orn/shrubs/azalea_leafminer.htm
https://entomology.ces.ncsu.edu/2015/09/azalea-caterpillars-feeding/
http://www.clemson.edu/extension/hgic/pests/plant_pests/shrubs/hgic2051.html