man i no how u feel, got the same prob, but got some good info off ere earlier on, the guy seemed to rearly no is stuff, now its obviously lak of Nitrogen as i av it, i never continued with a decent dose of N during the early weeks of flower hence the problem i have wich is allso ur prob by lookin at ya pics, there not goin to go green again so its a case of gettin some NITROGEN in there on ya next feed so the other growth stays green enough to finish the plant off, but its so close to the end for you n me and doin the right or rong thing now cud b telling so ur choice as to add or not at this l8 stage is urs 2 make, i personaly give a lil veg nutes wiv high NITROGEN content to see me through the next 18 days !! good look to ya and hopefully others will chip in and advise u better as i am a brand nooby, lol l8rs