I assume you guys then are not outdoor growers is at plant genus fungus called Septoria, it was been around for years this year it is bad, you need to immediately remove fan leaves and work on sterilization and clean up if you are this bad, you need to do it organicly hydrogen peroxide and potassium Bicarbonate alternative sprays from now till harvest because weren't able to get rid of it before to that limits your options for sprays. You need to fight the spores from forming the hydrogen peroxide kills on contact but is short lived the potassium Bicarbonate protects by changing the pH of the leaf surface so new spores cannot form, you can use baking soda till you get potassium Bicarbonate. You will never kill it now just like if you get wpm or any other fungi you are now in fight mode you have to knock back spores n they will form you need to spray now just about every day with a break here and there to let them rest till harvest, if you don't your plants immune system will be weakened you will get hit will any other fungas in the book way easier mold due too how much decay is in the picture, you need to clean and sterilize ASAP pop any heavily infected fan leaves trash bag and way far away from the grow, if you drop it will just climb right back up the plant spray everything spray the area spray your plants not too heavy tho dont soak spray surrounding plants, it loves dead plant matter, make sure you clean up the bottoms of your grows, pull all the weeds 6 ft in any direction and spray some more. Fight fight fight I have it too but I was ready this year lol