Buddy, @ week 7 your flowers look a little on the light side....
However, as long as your flower time is a 9 week deal, then yellowing of the lower leaves is normal. :thumbsup: Keep in mind, this occurs in the last 2-3 weeks once you have stopped her nutes, and a plain Ph'd watering is administered for the remaining weeks until her harvest. :jointsmile:
Oh! and to solve your pest problem, pick yourself up some Garden Safe: Fungicide 3 @ your local HD for like 5 bucks. It works great as a all-in-one spray for: Fungus, Insects, and Mites.