What Causes A plant To Yellow Overnight and Fan Leaves Droop?

[el Dream Reader]

Man Krunch, I've been following your threads since you came to IC. After watching your vert rooms and coco success it's killing me to see those monster plants dying off like that.
The only thing I can think of to figure out the problem is to try splitting the stem lengthwise, the fungi (if it is fungi) might not be in the part your looking at.
It looks like you plant your clone a few inches below the surface of the coco? Maybe the problem is closer to the rockwool. I believe you need more aeration around the root ball by adding some perlite or hydroton to the coco. I use straight hydroton when I RDWC.
There are a couple types of fungi that can cause this problem, Fusarium and Verticillium other than that there is the prospect of a plastic toxin (off gassing), I don't think it would be a virus.
Sam is right about the aggressive nature of these fungi, they are soil and airborne pathogens which contaminate many types of crops. The commercial treatment is to sterilize the growing medium before planting by using a steam sterilizer or an anti fungal agent. In a soil less system a UV sterilizing unit can work to kill off most everything, I just use the bleach. Millions of people drink chlorinated water everyday, I don't see a problem with letting the plants drink it too, considering it could be the difference between success and failure (it makes that difference for me). I hope you find the reason and the remedy to this issue soon, without seeing the problem progress in person and being able to check all the variables I can only recommend what I've studied and what worked for me.

 

[krunchbubble]

funny thing is i always have run bleach, and just started using hydro fungicide a week ago......

dont think its a water or air pathogen. watering plants with the same nutrient and there are many other plants in the same room and my other grow room is just across the hall of this one.....

the second plant that has died, has a some what mushy outer stem at the base where the rocks meet the coco. there is not alot of coco, i planted a 1 gallon pot then back filled with rocks

 

[Frozenguy]

funny thing is i always have run bleach, and just started using hydro fungicide a week ago......

Could it be the hydro fungicide?
Really sorry this is happening Krunch. Especially after your other troubles. It'll buff out..

 

[vannuysorganic]

Could it be the hydro fungicide?
Really sorry this is happening Krunch. Especially after your other troubles. It'll buff out..

That's what I started thinking.....

the second plant that has died, has a some what mushy outer stem at the base where the rocks meet the coco. there is not alot of coco, i planted a 1 gallon pot then back filled with rocks

Although Fusarium sounds like a good culprit as well especially when you say a mushy stem. Maybe something to do with the combo of mixing mediums?

 

[ImaginaryFriend]

Doesn't look like this, but to eliminate the possibility...

When you bury a root ball below its starting depth, sometimes a plant sends out roots from the main stem that wrap around the trunk. As the plant develops, these roots develop and can constrict the flow of sap from the roots to the canopy (and it's reversed flow).

Typically, this shows up in long term nursery plants that have been mispotted, but I could imagine with the rate of growth and root mass associated with RDWCs that it could happen, and it's symptoms might be consistent with your experience.

 

[ImaginaryFriend]

Even not knowing what's going on, it looks like there is something tragic happening.

What are your proactive options?

In the root rot thread, RR had success by transplanting out of DWC to coco.

Even though you don't have root rot, maybe some 20 gallons and coco might save this room?

 

[CloakNDagger]

Root suffocation.

I had a plant in a DWC bucket that died all of a sudden.

The air hose got disconnected and I didn't notice. a couple days later it was lying flat. The roots LOOKED good. still white and clean looking. But they had suffocated in the stagnant water with no D.O. coming through.

Are the roots firm and healthy? or loose and sagging?

My vote is root suffocation.

sorry for your loss.
CnD.

 

[krunchbubble]

Root suffocation.

I had a plant in a DWC bucket that died all of a sudden.

The air hose got disconnected and I didn't notice. a couple days later it was lying flat. The roots LOOKED good. still white and clean looking. But they had suffocated in the stagnant water with no D.O. coming through.

Are the roots firm and healthy? or loose and sagging?

My vote is root suffocation.

sorry for your loss.
CnD.

dont think so, roots are perfect. no sagging or dis colorization. i have 4 1/4 " air hoses under each plant going to a super bubbler. no problems with low DO here......

im at a stand still here.....

 

[vannuysorganic]

Is it continuing to spread?

 

[jakezking]

I'm growing outdoor in soil in 3 gallon pots, and I have a plant (GHS Lemon Skunk) that is suffering from these same symptoms; yellowing progressed from the larger fans to the smaller fans followed by severe drooping. Same thing happened last year to the same strain; no other plants have been affected, so far (knock on wood, fingers/toes crossed, etc.).

I tried a big flush today thinking I had some sort of lock out. My bud sites were not as droopy and have not yellowed; we'll see what she looks like this afternoon. I'll try to post a pic this afternoon as well. And, if I have any solutions, I'll let you know, but it looks like I'll be learning from this thread.

At this point, I'm leaning away from bacteria as no other plants have been infected. I had been thinking root rot, but the soil for this plant contains the same mix of added perlite and vermiculite as the others (similar to your medium being the same for all plants with not all plants being adversely affected).

As above, if I can throw a few cents worth of knowledge on the table I will, but I'm currently at a loss for you and me both.

My best to you and your ladies.

Here's the pic of my ailing LS - remarkably similar to your issue(s).

 

[krunchbubble]

lost second plant.......

third plant started dying last night............

so i dumped shitloads of bleach into the rez, no measure, just dumped, maybe 1/4 gallon..........

i just looked and it looks like the third one is coming back!?!?

 

[PoopyTeaBags]

wtf... krunch very wierd.... i wish i could offer some advice... and let me add this bleach helped a plant? lol amazing

 

[jump /injack]

Off gassing.

Off gassing.

Krunch, I just read a story in IC about a grower who lost his whole crop/several times and it was the tubing that he'd just started using. Other growers started to write in about their problem and its was traced to tubing made in China. Others said that certain types of PVC and types of hydo huts did the same thing with "off gassing." This was a very recent story, will see if I can find it and post name.

 

[jump /injack]

Off gassing.

Off gassing.

"So I have been experiencing a mysterious yellowing for about 10 months. Every thing that went into one of my 11 different rooms (some that had been going 5+ years) started to yellow and eventually die." http://www.icmag.com/ic/showthread.php?t=188434

 

[PoopyTeaBags]

Krunch, I just read a story in IC about a grower who lost his whole crop/several times and it was the tubing that he'd just started using. Other growers started to write in about their problem and its was traced to tubing made in China. Others said that certain types of PVC and types of hydo huts did the same thing with "off gassing." This was a very recent story, will see if I can find it and post name.

please post this as a news story to as its very informative and i never heard of it.

 

[dusto2k3]

please post this as a news story to as its very informative and i never heard of it.

https://www.icmag.com/ic/showthread.php?t=188434

 

[jump /injack]

https://www.icmag.com/ic/showthread.php?t=188434

Here is a part of the story.

Warning new off gassing product!!!!
Warning new off gassing product!!!!

--------------------------------------------------------------------------------

So I have been experiencing a mysterious yellowing for about 10 months. Every thing that went into one of my 11 different rooms (some that had been going 5+ years) started to yellow and eventually die. My first instinct was my ph I checked my pens, they were not very far off but I calibrated and bought new probes anyways. That did nothing. Then we suspected the nutes, maybe we got a bad batch. I had bought 6 gallon jugs and filled all my 1 gal’s up off the same batch. Call the company run the batch numbers and they say they are 18 months old, So we went out bought new nutes and nothing changed. So after that I figured my favorite brand had fallen off and we decided to try another brand. We go buy $1000 worth of canna. And we thought possibly it could be something with our clones so we picked up a batch of clones from an LA club. Same thing new nutes new genetics same yellowing. So now I am scratching my head start making some calls visit a bunch of other rooms, and at least 20 in my immediate area have this same mystery problem. So I do some research find out we are all on the same water supply. I found 4 rooms on another water district doing bitching so I say BINGO, It must be the water. We go out and buy a 275 gallon tote and start buying water from this other district. A real pain in the ass I might add we had to do 2-3 trips a week to meet our demands. Same problem. We start doing testing 1st water test, 2nd tissues sample, I have a horticulturist come and look at things. He suggests an Iron def. We get our tests back everything looks good. We do a tissue sample off a room that is doing good compare our results and everything is fine. Except my plants still look like shit. So I emailed my test results to my original nute company they pass it around the office and let everyone take a look at it. I get a call a couple of days later from them and he asks me if I have ever considered off gassing. What is crazy is the night before I found a thread on the hydro huts and was showing my partner how Identical it looked. So now we go to our rooms and start looking around at what it could possibly be. Like I said some rooms had been going in the same location with nothing changed in about 5 years. There is only 1 new product that we had replaced the ½ tube that connects all the buckets. I started to call around and every room that was having the problem had replaced there tube with the new stuff. The 4 rooms that were doing good were using old hose and was just washing it out. So being lazy saved theses guys who would of thought. I have been talking to the company that made the offending tube for 4 months and they do not wish to resolve this problem even though I have proof that the toxic chemical is in the tube. We have done GC/MS testing, LC/MS, testing and FT IR testing that show conclusively that the chemical Diisobutyl phthalate is in the tube. This is the same chemical that caused the problems with the hydro huts. If you are having a mysterious yellowing and are using NGW tube replace it immediately and please respond to this thread. I am going to be working on a class action against these guys. I have some of the worlds top experts on the matter willing to testify and do any research needed to win this case. The idiots printed there names on the tube it has n-g-w.com printed every foot, so it is easy to identify.

 

[krunchbubble]

spoke to soon, there dying......

 

[PoopyTeaBags]

so sorry krunch i wish we knew what was going on... you think it could be off gassing?

 

[dusto2k3]

I've experienced off gassing and it does not sound like his problem.
off gassing does not kill that fast.