Thrips aren't as rapid-deadly as spider mites. However, they can be very difficult to eradicate (from experience)


a pyrythrium bomb is what a friend uses in her veg room quarterly to keep them away. I used pyrithrium spray (Safer insecticide soap) and sprayed mine up to 2 weeks into flower. (weekly - can damage leaves if soaked too badly, you may want to rise off with a light spray of water.)

You might hand a Hot Shot in the room at the intake vents and in the doorway. that helps in general.