young marijuana not growing, dying, withering and turning yellow PLEASE HELP!!

also getting little yellow/white frekles on my leaves? scarid fly things? just convinced my mate to do a lil grow himself.

fuck, spider mites! i just saw i vid of what they do, def. got em, gonna order this as soon as i get some money thru, http://www.greenshorticulture.co.uk/Pest-Disease-Control-21/Spider-Mite-Killers-112/Spray-Safe-916.asp to get rid of em. always problems, next time ill be able to prevent it with this other stuff u can get. hope ur still there sweetsmoker

just used gnat off for scarid flys and spray off for the spider mites, took a male out of the room, when i tried bending one of the plants their was a slight snap noise and the stem must have split a bit, but it still hasnt snapped off it looks intact. do you think it will die?