Help holes in my leaves. Bugs?

Northeast grow said:

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So this is my current issue I think it’sa big issue. but none visible atm. I went ahead and bought some montere bt bug treatment. Just curious as to what others would think of my issues. Any information would be helpful.

Strain info:

Area- northern Vermont
Age- 6 months
Stage- early preflower
Strain- lemon skunk
Medium- coco and soil mix
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