Organic OG Kush

Week 3 of flowering stage - In this cycle I'm flowering at night to be able to take advantage of the low temperatures because I don't have air conditioning. Unfortunately I left a "window" of the grow box open and the plants delayed flowering, despite starting the third week, because of the calices formed to realize that not 2 weeks of flowering had passed. The aspect is 1 week of completed of flowering, so this would be the beginning of the second week. My OG Kush has some leaf disease, I don't know what it could be. But Im not worried yet with it.