Could be leaf borer. I never seen the damn worm only the damage the left behind. Usually these do not attack indica. This is a bit of a puzzle.
What soil did you use?
Metharhizium helps if it is the worm.
Another trick i learned fro @GYOweed is aspirin. For me It is easier to get than Salicylic Acid. It boos plant immunity. Leaves thicken after a week.
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