Plant discoloration and septoria?

So I believe this plant to have septoria I have sprayed it down with a Fungicide and since then I've noticed that it's changed to this color I'm using sinsi grow a+b and it seems to be doing okay other than the color change so what is going on with my plant and can I still use the buds off of it if it has septoria new to growing they are on 750 watts 18& 6

You don't have septoria,you sprayed for a problem that you don't have.Find the real problem .

Your girl looks hungry...and as noted, forget about the 'septoria'...you have bigger fish to fry. Good luck.

Looks more like over watering or a PH issue. Def wants more food too