What's wrong with my clones?

[Guest]

Think back and find out what has changed since the last time. Something MUST have changed in your equipment?

Just a thought, but it looks like transpiration, did you have a dome on them before? Being that they were already rooted I doubt if that's the case, but ya never know without being there and watching what you're doing...the only other possibility would be rootzone temps.

The suggestion has been made to do a trial on a fresh coco pot & see what happens, process of elimination.

Good luck, this is an interesting mess. I'm sure you'll figure it out.

 

[Charles Xavier]

Greetings clowntown

What's wrong with my clones?...clowntown

Pythium (sp.)....probably P. Irregulare.

Sincerely,
Charles.

 

[clowntown]

How did you come to that conclusion?

 

[scegy]

hm man, u said u run 24/7....maybe the problem is in temps, since they don't get the chance to cool off? did u read the temps at root level?
constantly spraying them over the leaves and high temps...sounds like good ground for bugs company... it think that charles had this in mind too

thinking out loud...

try the temps thingy

p.s. sorry i didn't see that this has already been brought up...so you see, the odds are getting bigger

 

[resinryder]

EC of nute solution is 1.3 - 1.4 after adding pH down, and now 2.5 mL / L of CannaZym and 0.5 mL / L of CalMag+ (that's roughly 2 mL / gal). Starting EC of the tap water is approx. 0.06.

Thinking that may be your problem right there...Too much too soon?

 

[Charles Xavier]

Greetings clowntown

How did you come to that conclusion?...clowntown

1) There is a pathogen vector.
2) (near) Perfect conditions for pathogen proliferation are manifest.
3) Corroborating images.

Sincerely,
Charles.

 

[GMT]

Every post a stunner Charles!

 

[clowntown]

1) There is a pathogen vector.
2) (near) Perfect conditions for pathogen proliferation are manifest.

Could you please explain? This is very vague.

 

[Guest]

http://en.wikipedia.org/wiki/Vector_(biology)

a vector is an organism that does not cause disease itself but which spreads infection by conveying pathogens from one host to another.

 

[Charles Xavier]

Greetings clowntown

Could you please explain?...clowntown

Certainly...Several different species of the fungus-like organism Pythium causes 'Root rot', however, Pythium Irregulare and Pythium Ultimum are generally considered the most common.

(Another species, Pythium Aphanidermatum is also common, but since it is particularly associated with the commercial ornamental, Poinsettia, it is likely not the culprit in this instance.)

P. Ultimum is found in field soil; all types of soil from loam to sand, but nonetheless soil. P. Irregulare is found in marshes, ponds and streams (both in the water and in the sediment), compost and organic matter…particularly on the dead roots of previous crops.

P. Irregulare flourishes in water retaining mediums. Aerobic conditions are not a deterrent. It is a prolific species that can/will out-compete beneficial micro-organisms particularly if introduced to the rhizosphere before an established beneficial colony exists…especially if root integrity is compromised by a recent transplant or if roots are subjected to stress; e.g.: too high a concentration of nutrients.

General Information: P. Irregulare can potentially and has infected every greenhouse cultivated crop species. It is also quite prevalent in indoor gardens. It is easily reintroduced into sterilized soil or soil-less mixes by using dirty tools, dirty pots or flats. Humans or pets can potentially transport Pythium; it can survive on work benches or grow-room floors that have not been thoroughly cleaned. Fungus gnats, shore flies and similar can actively transport Pythium; however, in most cases infection does not occur unless the roots are compromised from larval attack.

It is possible for commercially available soil-less mixes to be contaminated with Pythium.

P. Irregulare poses a threat to crops grown in hydroponics (coir included) because it has a ‘swimming’ spore stage (moves in water).

Additional information can be discerned here:

http://www.icmag.com/ic/showthread.php?t=61158

Sincerely,
Charles.

p.s I trust that if any vagueness persists, it can be further clarified upon request.

p.p.s.

a vector is an organism (or environment) that does not cause disease itself but which spreads infection by conveying pathogens from one host to another....brainthor

Thank you, brainthor.

(It is easy to forget that some may not be familiar with the terminology I employ...my apology)

C.X.

 

[Spaventa]

Hi Charles Xavier

How exactly do the pictures corroborate your Pythium diagnosis? Pythium infected plants wilt but so do plants that are stressed, overwatered, underwatered or not sufficiently ventilated. Pythium causes the tops/new growth to wilt first - these just look plain wilted all over...
Also, exscuse my ignorance but isn't there ALWAYS a pathogen vector present in most grows/gardens?

Clowntown - How are they now?

 

[clowntown]

My sincere apologies for not updating this thread.

Upon closer look it appears that Charles was correct, although I didn't want to believe it at first. One very import note that I had forgotten was that in my area, a very sudden heat wave came through for 4 days... going from 70s (F) to 90s (F) for a few days, at what seems to be the worst possible moment: right after transplant from Rapid Rooter plugs to 4" pots of wet, warm coco with fairly weak root systems. I'd imagine that would do it.

The proof was when I took the plants out of the pots and saw the roots.

Charles, thanks for the help and diagnosis and the detailed post.

Spaventa, I appreciate your view on this as well. I wasn't aware of any of that. They're doing awesome now... in the landfill.

Good news is I can replace all those genetics and more without a problem; bad news is the downtime.