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 Post subject: Can this Phal gigantea be saved?
PostPosted: Wed Jan 08, 2014 10:13 am 
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This is a bummer. One of my larger Phal gigantea in spike is developing a crown rot. I noticed a yellow coloration in the crown, it prompted me to take a closer look.

I spray Clearys 3363 fungicide. Spray Peroxide into the affected area. Dust cinnamon powder. I hope to save this plant. It really is sad. There is a new spike developing. Somehow the water got into the crown and bacteria took over. I will make a Kocide paste today. I will try to do all these but I think the plant will look horrible after this - even if I'm to salvage it.

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 Post subject: Re: Can this Phal gigantea be saved?
PostPosted: Wed Jan 08, 2014 10:31 am 
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You're the expert on can these be saved Peter. I'd say yes regardless as the plant seem to have enough energy to at least make a basal. Hopefully you caught it early enough and the rot isn't too extensive.

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 Post subject: Re: Can this Phal gigantea be saved?
PostPosted: Wed Jan 08, 2014 10:37 am 
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In my experience, this plant will die. There is no way to save it. It's a horrible experience to see a large plant going downhill, loosing big leaves left and right. I might get a keiki out of this. It sucks. I hate winter.

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 Post subject: Re: Can this Phal gigantea be saved?
PostPosted: Wed Jan 08, 2014 11:10 am 
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Peter, there is a product called Dragons Blood that is derived from a tree that has worked for me in the past and not only on phals. It looks like blood. I'm out of it right now and have been meaning to order more. You can get it online.

Google sangre de grado. There is some info about it on Slippertalk if you do a search.

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 Post subject: Re: Can this Phal gigantea be saved?
PostPosted: Wed Jan 08, 2014 11:23 am 
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Yes, if anyone can save this, it will be Peter.. I hope the infection clears and the crown makes new leaves instead of a keiki.

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 Post subject: Can this Phal gigantea be saved?
PostPosted: Wed Jan 08, 2014 1:13 pm 
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Thank you Brenda. found the link on slippertalk here

http://www.slippertalk.com/forum/showthread.php?t=2106&highlight=dragons+blood

Han - I like your blog. :)

Here are more pictures from this morning after I talked to Ken Avant - who has more experience than me with Phal gigantea. Ken suggested that I removed as much the rotted part as I can. This is not what I want to hear because that's pretty much the entire leaf. But I suppose I want to keep the plant alive - even though the chance is slim. Rot has worked its way into the crown

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Here are picture of another Phal gigantea with crown rot. It has two keiki that over time has grown to nice size. This was one that was very large once. I did not cry as much with this one because I have not seen its flower before. I dont' recall if I make much fess to treat it.

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While we are on the subject and I'm taking picture, here is a small keiki growing from a crown-rot Phal violacea - which is another species that usually don't recover from rot. I did put cinnamon in the crown which washed off over time.

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I removed the weeds after I took these pictures. :)

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 Post subject: Re: Can this Phal gigantea be saved?
PostPosted: Wed Jan 08, 2014 1:47 pm 
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Peter, that's sad...I keep my fingers crossed and hope you will be able to save the plant. It looks as if you caught the rot early so you can probably save the "rest" of the crown and perhaps get an additional basal keiki. Good luck!

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 Post subject: Re: Can this Phal gigantea be saved?
PostPosted: Wed Jan 08, 2014 2:44 pm 
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It will be really sad to lose such a big P. gigantea. I hope it will recover...

As a side-line defense, you may want to try aspirin spray, too. I'm gradually learning about the plant immune systems, but there are fair amount of evidence that aspirin can induce the plant immune system in the healthy cells. One of the natural SOS signals in plants is salicylic acids (SA). Aspirin is slightly modified form or SA (acetylsalicylic acid, ASA), but ASA is used to induce the immune system to study the down-stream mechanisms of plant defense system. Here is a recent review of plant immune system (I admit that it is a bit too heavy for most people):
http://biology.duke.edu/donglab/images/ ... l_2012.pdf

A lot of us are focused on externally/directly fighting the pathogen (by bactericide, fungicide etc). But in addition to it, letting the internal mechanism of plant defense system should assist stopping the disease progression.


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 Post subject: Re: Can this Phal gigantea be saved?
PostPosted: Wed Jan 08, 2014 3:10 pm 
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I can hardly stand to look at that big leaf. so sad. :cry:

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 Post subject: Re: Can this Phal gigantea be saved?
PostPosted: Wed Jan 08, 2014 7:33 pm 
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So sorry, Peter. I will keep a closer eye on my plants, just in case.


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 Post subject: Re: Can this Phal gigantea be saved?
PostPosted: Wed Jan 08, 2014 10:17 pm 
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Thanks, Peter. I'm still an amateur but seeing that leaf, can't help but commiserate as Brenda put it.. :(
brenda wrote:
I can hardly stand to look at that big leaf. so sad.

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 Post subject: Re: Can this Phal gigantea be saved?
PostPosted: Thu Jan 09, 2014 7:22 pm 
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So sorry, Peter, to see that gigantea get crown rot and that huge leaf fall off. I can most definitely relate big time! It's good you got to it when you did, and I think it should be able to put out a keiki. I think Ken gave you good advice. It just seems natural to me that you would want to remove any black/darkened areas on the plant because it always seems to spread otherwise. That's what I do when I see rot. Really hope it regains it's health for you!!

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 Post subject: Re: Can this Phal gigantea be saved?
PostPosted: Fri Jan 10, 2014 4:17 am 
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NO ES BUWENO!!!!!!!!!!!!!!!!!!!! :o

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 Post subject: Re: Can this Phal gigantea be saved?
PostPosted: Fri Jan 10, 2014 5:52 am 
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Even if you cannot save this plant, I appreciate your sharing the triage you are doing to save the plant. This is very informative. I have lost several plants with exactly the same symptom.

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 Post subject: Re: Can this Phal gigantea be saved?
PostPosted: Fri Jan 10, 2014 5:33 pm 
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Peter I used to use hydrogen peroxide but now use bactine.


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