bad nights sleep so I'm trawling through RIU pages to try to help. . . .
Shit man, I'm with jayjay 100% here, that is Thrips.
A pretty big outbreak.
I use a product called Pyrethrum 5EC - 4ml to a litre folia spray, very good and fast acting. THEY CAN BE SAVED (not the thrips, yr plants), but there's gonna be some effort.
1st, clear your tent if you can and spray it down with a weak ish bleach solution. (The prime reason Thrips invade, is a not so clean growing environment!!)
Get each plant, turn it upside down so all the undersides of leaves are visible, and spray the fuck out of it till is dripping, let the leaf run off and your excess spray fall onto your other plants. do it to all.
(Better yet, if they are small enough cuttings, make up a 10 litre bucket of Pyrethum, and dip the entire plant into the bucket, and stir it around for 5 seconds, like as sheep dip, lol. Shit just seen they're in flower, sorry, dusty eyes., kick in Sativa!!!, lol. Dipping is out. I use a paint brush in flowering to paint Pyrethum onto the underside of the leaves, if the leaves are that bad, as some of yours are, I'd carefully remove the leaves, with something underneath them as you pluck them, so no critters fall of onto your soil to start the process again, I 'd slip a bag over the leaf first and then pluck)
THEN, you are gonna need to clear your medium of the infections the larvae can leave behind . . . . I use Guard n Aid Rot Stop, 3ml to a litre, drech em, wether you've just watered them or not . . . .
Repeat Pyrethum 5EC wash every three days, spray your trunk to, as thrips travel up it, I'm told, once they pupated (or what ever the word is, lol)
Good luck m man, the important thing is not to loose faith and to soldier on and beat these mother fluffers!!!!
DON'T GO DOWN WITHOUT A FIGHT!
NLB!!