Hello, could someone help me? I wanted to switch t...

Looks like wpm after attempting some sort of foliar spray.. spread it out vs circular colonies. If it's some kind of poweder like DE, you should still stop doing that. Blocking light dioesn't help. If that is growing on your plant and not from you doing something, throw it out. It's trash. That much WPM would be all over the fucking place as it's been spreading spores for a long time at this stage of development.

Looks like white powdery mildew. It’s sad but it needs to be tossed. Those spores spread around so everything needs to be cleaned. In the future you’ll need to make sure the humidity isn’t too high and get some really good air flow so this doesn’t happen again

Powdery mildew, plant is f@cked whatever you would do. All plant pesticides are for berries and digestion, not for weed and smoking - if someone will offer you to use any ... Get rid, clean and wipe everything , then restart.

You've got multiple issues going on that will be impossible to fully fix based on a photograph of 2 different leaves. We need 2 full plant pictures. One from the side and one from the top. We also need to know your plant's environment. (Daytime and night time temps, and what VPD you're trying to run at.) We also need your feed routine including what nutrients you're using. As of now, all I can say is you have nutrient toxicity. Give us more details to work with. No one can fully correct your issues with 2 photos of a leaf.