Lemon Kush Headband

Hi @S_Dubz, nice monsters in here! I think there's nothing to worry about, your plant seems to be auto-regulating its system, by getting rid of the leaves that can't get enough light. Lower leaves often fall by themselves especially after the preflowering stage where Nitrogen consumption was at its peak. Let's see how this goes with time but if it's only the lower leaves, do not panic, let the lower parts breath and make sure the whole plant has a good airflow. Let me know in the comments section if you need any further information, and happy growing! 👊

Seems to be a lot of outdoor growers living in areas that are getting cooler temperatures having the same issue showing up. Moisture ,cooler temps longer nights are a perfect environment for fungus and mold,mildew. The rain and morning dew sitting on the plants isn't helping matters either. You are definately doing the right thing by removing the infected buds. I would cut a few inches below where it seems healthy. I would sterilize the clippers between cut in a solution of 1 part bleach and 9 parts water. Then rinse in clean water. May be easier to use two clippers soaking one while using the other. I would do this only when dealing with removing contaminated plant parts. Next I would perform a modest defoliation of the larger fan leaves to open her up for better air circulation and so more sun light will reach her. Don't strip completely. There has been some success in using Bacillus Subtilis to combat Botrytis cinerea and other fungal/bacteria rot in plants. https://www3.epa.gov/pesticides/chem_search/reg_actions/registration/decision_PC-006479_9-Aug-06.pdf#targetText=Bacillus%20subtilis%20strain%20QST%20713,bacterial%20spot%2C%20and%20walnut%20blight.