hmm. Tough for me to see. I've battled Thrips for 2 grows now and finally killed them with a Pyrethrum fogger (or whatever that stuff is called). I don't see any damage in those pics that resembles mine, and you say you've got some webs forming, eh? I'd say it's the dreaded spider mites.

Although you seem to have come to that conclusion already.

Just cuz i'm bored at work...here's a link to pics of my thrip damage. The silver patches on the tops of the leaves...http://boards.cannabis.com/plant-pro...ml#post1869365

Good luck. Sounds like you are about to engage in full scale war.
Skeet