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[BubbleCat]

It is winter and like every winter some plants get annoying visitors.
Now this one is interesting, its the first time I've seen it or at least took a closer look at it.

It seems to eat away on the leaf, leaving the cell skeleton, and once the leaf is weak enough its curled up and fixed in place with webbing.
This lead me to the conclusion: It must be arachnida ? What kind of ?

[chronic]

 That could be from a snail. Was the plant outside in the summer? I found similar  on my plants.

[chronic]

Oops... wrong turn.

[Bach]

Looks like a leafroller caterpillar that gave up. They usually roll the whole leaf into a tube and eat it from inside.

I occasionally get them on my Psychotrias but never on the Salvias.

[BubbleCat]

I know the leafeollers. But this is different. Several leaves are affected so I can observe different stages. The leaf gets eaten from inside out and at the boundaries of the damage I can see small black spots (I assume that is bugs). Once the damage is larger the webbing appears. So it appears to me the 'idea' is to eat away from the centerof the leaves so its structurally weak and can be curled up and held this way by means of webbing.

No snails here. The white is webbing like a spider would produce. Also snails eat the whole structure I believe. Theese arent true holes but punctured cells it seems.