Fungus/mold/mildew problem? Pics inside

Hi everyone, first post here. I am having some issues with my plants. Fairly new grower here. Here's the rundown:

skywalker og
8 days into flower, did a gradual change from 24/0 to 19/5 and then 1 hour less each day until 12/12
soil medium
general hydroponics flora series nutes (http://www.ncwgs.com/images/flora series.jpg). I follow the green chart. I don't use the floranectar. I use molasses in the last half of flowering.
ph water to 6.2-6.3 every watering
1000w HPS lights, about 24" above plants
temps running a little hot right now (split ac system will be finished tomorrow) at 80-84

The humidity hit mid 70's a few times in late veg and was often in the 55-65 range for a while. Once in flower the humidity was generally below 60 most of the time. I would have had the dehumidifier in there for the first few nights in flower but it was being used in another room as it has been very humid here in the midwest recently. Now it's in the 40-55 range, lights on and off. I have good ventilation in my flower room... 2 8" fans/filters exhausting out of the room and one 10" fan/filter that I sometimes exhaust out of the room (but creates a bit of a vacuum in the room) and sometimes let the air from the filter recirculate in the room. I'm still playing around with them and seeing what works best. One 6" intake fan drawing air in from basement, and 2 6" passive intakes.

I have had a lot of gnats flying around and although I'm not sure if they were causing any damage, to be safe I thought I'd try and get rid of them. I read about using Mosquito Dunks crumbled up and sprinkled into your soil to kill the gnats, so I tried that. The very next day, all of my plants seemed to have some type of issue... I thought it was some type of mold/mildew/fungus, but I can't seem to find any pictures online of anyone having a similar issue. I'm not saying it's from the dunks, probably just coincidence. It WAS really humid the week or two prior, so I'm thinking I might be seeing the problem now. It's starting from the bottom of the leaves and working up the plant. It's NOT white like white powdery mildew. It's more brown or grey looking, and some of the fan leaves are turning crispy. Some of the new growth is looking pretty weird... black tips on a few of the new shoots.

I've never had an issue with mold or mildew before, and this is the first time my humidity was really high throughout my house, where I could not control it as well as I'd like to in my basement.



I'm hoping someone can tell me what is going on with my plants. It's in my veg room, on my mothers, and now possibly on my new clones which are ready for transplant. I have greencure and sereade on hand if needed. Any ideas on what this is and what I should do to get rid or it or get it under control?

Bump to the top...

Sorry I can't help you out man, maybe as a precaution remove the most affected leaves?
also it looks like it could possibly be some type of burn, but im not sure

Thanks for the reply. I did remove some of the most affected leaves/branches, mostly lower level branches I was going to cut off anyway as part of my first week of flower pruning. I just don't want it to spread. There are some ares that look like burn from nute splash and/or nute burn, but other areas look black and brittle. I think I am going to spray them all down with greencure tonight 30 minutes before the lights come on. From what I've read, the only negative is burning the leaves, but I'm wondering if those people who experienced burning didn't give their plants ample dry time before being thrown back under the lights.

Here's another picture. It doesn't seem to be spreading at all compared to yesterday, but it's still cause for concern. Most plants have a little of this going on somewhere or another. Anyone know what this is?

one last bump...

your plants look burnt to me, over feeding and burnt by the hot air of your environment
i cant see PM in your pics but maybe some fungus which does look like burning

remove all those dead leaves, and spray it with something that will kill fungus like systhane
greencure could make it worse as it will just add more moisture to your room and will not kill anything

peace

I really suck at this, but....

Looks like multiple problems to me, burn, lockout, toxicity....

A flush and then reduced nutes might be a thing to try.

Try watering from the bottom to fight the gnats, and cover your soil with something like garden sand or hydroton.

Good luck.