The very first thing I would check is the ph of your soil runoff....and your water too if you don't already.

What are all your conditions, soil, etc?
Weedhound Reviewed by Weedhound on . Nutes or bugs? I have a female sativa who is now in her 8th week of flowering under a 600w hps lamp. about 3 weeks ago, a bunch of little white flying things (white flies?) started to gather more and more frequently and dispose little white balls on fan leaf undersides. they also began leaving yelloy spots about the leaf eating chlorophyll. now, the fanleaves in the bottom half have all fallen off or are on the verge of it, and the problems climbing still. (branch leaves seem virtually unaffected, its Rating: 5