I'm stumped! Would like to know what this is before I lose my whole crop :(

[oicu4202]

Here are some more pics of the week sevens with the light off, maybe this will help clear things up that it's not nutes.View attachment 2263558View attachment 2263559View attachment 2263560View attachment 2263561

Notice the leaves are brown but some of the buds are still green?

 

[patlpp]

What is that wall? Insulation? Not that it applies but interested. Yea I noticed the green bud too.

So you are saying if you take one of those damaged plant thats in flower outside now it will recover?

 

[oicu4202]

What is that wall? Insulation? Not that it applies but interested. Yea I noticed the green bud too.

So you are saying if you take a damaged plant thats in flower outside, it will recover?

The wall is just a part of the cellar that I wasn't allowed to modify, usually I don't put plant's there, but those ones are in quarantine. But ya, a plant outside will recover. The damaged leaves will still be damaged, but all the new growth is vigorous, and so is the old growth that isn't damaged. This thing is scaring me because a plant will do fine until either 5 or 6 weeks of veg or if it makes it to flower it will be good until week five or so and then one or two will start yellowing and browning up and then it spreads to the others where by the time it gets to harvest, most of it is only good for hash.

 

[patlpp]

Man, that is so strange. Regular HID's ? Central air conditioning with dirty vents? ozone generators? Damn , what gets me is the consistency, green bud, and taking them outside stops it in its tracks. I'll dwell on it and pop back in if I have any other idea's. Need more peeps in here to brainstorm.

 

[oicu4202]

Man, that is so strange. Regular HID's ? No air conditioning or ozone generators? Damn , what gets me is the consistency and taking them outside stops it in its tracks. I'll dwell on it and pop back in if I have any other idea's. Need more peeps in here to brainstorm.

Thank you. I do have stand alone air conditioners in each room. It started to show up lightly about 5-6 months ago before I hooked up my ac for the summer though.

 

[Dr Gruber]

Please look at the pictures better. It is not nutes. I have been growing the same strains on the same schedules for a couple years now, I know a nute problem when I see it and this is not a nute problem. I wouldn't be posting here for a nute problem. Nutes do not make a plant brown up and die like they are. Plus, it's only some plants, not all. It will start in one spot and then spread, like a mold or a fungus. The fungus gnats being there are not good. Is this what they do to a plant? The third pic in of the bud, if you look closely you can see what I'm talking about.

ok...but a PPM meter wouldnt hurt to have...then you will know for sure.

 

[superjoint]

the fungus gnats' larvae will infest your roots causing pythium,and be careful with the excel,I burned some cucumber plants outside using that stuff too much,it says to only use it so many times and thats it

 

[smokinfool]

You figure it out? I have the exact same thing, and it's happened before. Your pics look EXACTLY like mine. I wind up half way through flower and struggle to get to the end with mediocre harvest of something I can only cook with.

It's a bug of some sort. Pyrethrum knocks it back, but it returns and I hate to use sprays so far into flower. The black dots are shit it leaves behind on the leaves. I can only occasionally find one alive. They look like a bigger black dot only slightly bigger than the shits it leaves behind. You can see them move if you watch them a while.

Last time I had them, I tossed my plants and sterilized the space. When I started over it was good until my second harvest, when they finally returned. Getting sick of it.

 

[B.B. King]

What do your roots look like? I've been dealing with a very similar issue, and have indeed found it to be pythium.

Grow well,
B.B.