Cattleya leaf problem black spot

[JMNYC]

Originally Posted by bil

Damn thing had but one live root and the rest was a solid mass of dead roots and sphagnum moss. I'm a noob, but even I know that's not right.

It's now in a nice open mix of bark and sphagnum moss. I can't see new root growth, but it is throwing a nice fat shoot. The other cat that had the same root problem is thrusting roots out like a little darling. So far it seems to me that no matter how screwed they are, these plants will almost come back from the dead. (Almost).

I applaud yr instincts! Trust them! Be the architect of your own journey while also being open to input and assessing all of it. I will share, I came to pot all my cats in coarse tree fern fiber. I switched from my good bark mix early on, and with amazing results. I would not include moss in media for catts....they like to be fully drenched and then, using a perfectly draining mix with air to the roots, dry fully.

---------- Post added at 03:56 PM ---------- Previous post was at 03:53 PM ----------

Originally Posted by bil

Damn thing had but one live root and the rest was a solid mass of dead roots and sphagnum moss. I'm a noob, but even I know that's not right.

It's now in a nice open mix of bark and sphagnum moss. I can't see new root growth, but it is throwing a nice fat shoot. The other cat that had the same root problem is thrusting roots out like a little darling. So far it seems to me that no matter how screwed they are, these plants will almost come back from the dead. (Almost).

---------- Post added at 02:53 PM ---------- Previous post was at 02:49 PM ----------



OK, thanks for that. I do like peroxide, because it isn't in itself anything that is too chemical, if you know what I mean. It doesn't in itself leave a lot of residues. However, there are other treatments, I agree. I like powdered sulphur, but the problems I have had getting it here, you would weep.

Peroxide is great for getting bloodstains out of concrete. (don't ask)

NO! I wanna know about the blood stains!!!!

In all endeavors, I chase data, sometimes fast, and always choose the most conservative but effective route to a given fix....be it with computers or plants, medical issues or anything else.

We should try to avoid using a sledge hammer to kill a fly.

[bil]

Originally Posted by Brooke

Bil here is a link describing what it appears you have on the leaf. Scroll to the bottom to read the preferred treatment for it. Your idea of peroxide was correct and hopefully you have stopped the spread of the infection.

http://www.staugorchidsociety.org/PD...ySueBottom.pdf

JMNYC peroxide is one of the best things to keep on hand to stop many infections. Between it and the brown Listerine you might be able to stop infections such as crown rot. Peroxide will oxidize on skin but using it a couple of times on an orchid will not hurt the plant and might stop the infection.

Please remember to keep the peroxide in the original bottle because it loses its potency when exposed to light.

Brooke

extra thanks for that article as it said not to use copper based fungicides on dendrobiums. I didn't know that, so it has saved me from a possible screw up.

---------- Post added at 03:00 PM ---------- Previous post was at 02:57 PM ----------

One of the dogs was castrated and the vet splashed some blood on the concrete. I wondered what to do, and as an experiment dripped some on. It fizzes like crazy and the blood just disappears.

Re the matrix for potting, I did put in some moss because the substrate dries out so fast you wouldn't believe. At the moment with the temps and air movement, I am up to three waterings a week.

[JMNYC]

Originally Posted by bil

extra thanks for that article as it said not to use copper based fungicides on dendrobiums. I didn't know that, so it has saved me from a possible screw up.

---------- Post added at 03:00 PM ---------- Previous post was at 02:57 PM ----------

One of the dogs was castrated and the vet splashed some blood on the concrete. I wondered what to do, and as an experiment dripped some on. It fizzes like crazy and the blood just disappears.

Re the matrix for potting, I did put in some moss because the substrate dries out so fast you wouldn't believe. At the moment with the temps and air movement, I am up to three waterings a week.

The vet splashed blood on the concrete? OMG, where did he or she do the neutering?

You did right re the moss.....in response to the reality of your INDIVIDUAL GROWING ENVRIONMENT!

So many things are so case specific!!! But make no mistake, even in dilution, peroxide is caustic.

[bil]

Originally Posted by JMNYC

The vet splashed blood on the concrete? OMG, where did he or she do the neutering?

You did right re the moss.....in response to the reality of your INDIVIDUAL GROWING ENVRIONMENT!

So many things are so case specific!!! But make no mistake, even in dilution, peroxide is caustic.

Ummm yes. Out here things are a bit casual. She just shot him up, rolled him onto a cloth on the terrace floor, set up a localised sterile area and snipped away. In her defence, the blood stains were small. She is known as the queen of castrators, and does a lot of horses. In the south of Spain in Andalucia, the men are very often very macho and butch, but she sees quite a few of them faint dead away when she gets down to business.

Your comments remind me of a very good article I read a while back, I think entitled 'how to kill orchids' which was very well written and nicely observed. In there the writer pointed out that with the best will in the world, what works for one person won't work for another as the conditions are different in almost every case.

Here I am pushing my luck a bit, I know that. The summer is hot and dry and the winters can be cold and wet, but inbetween, it should be fine. I have always found orchids fascination, and I figured that if I never tried, I would always regret it. So, I have a small collection of Cats, Cymbs, dendrobiums (mostly rescued from dire straits and visually only fit for compost) Phals and a couple of vandas. It may be that some won't do very well, but if that is the way it goes at least I will know which type to focus my efforts on. I have spent the bulk of my life proving people wrong when they said I couldn't do something, so we shall see.

Wish me luck!

[Brooke]

[QUOTE=JMNYC

'Preferred" is nuanced and relative and always open to debate. I almost never get bacterial issues, but I've known about the agents in question forever, and if I see any related problem beginning I choose those I mentioned.

I might also share I am adverse to all dogma. Erodes the dynamic potential of any journey![/QUOTE]


If you almost never get bacterial issues, then I thought a well respected source giving the information would be better than me trying to convince you of something. Obviously I was wrong but the reason I included the link was for Bil's Catt problem, not any problem you might have.


dogma |ˈdôgmə|
noun
a principle or set of principles laid down by an authority as incontrovertibly true:


I am not interested in your journey, I was interested in giving correct information to the person having a problem. Peroxide has been a staple in many orchidists tool box for a long time.

Brooke

[JMNYC]

Originally Posted by Brooke

If you almost never get bacterial issues, then I thought a well respected source giving the information would be better than me trying to convince you of something. Obviously I was wrong but the reason I included the link was for Bil's Catt problem, not any problem you might have.


dogma |ˈdôgmə|
noun
a principle or set of principles laid down by an authority as incontrovertibly true:


I am not interested in your journey, I was interested in giving correct information to the person having a problem. Peroxide has been a staple in many orchidists tool box for a long time.

Brooke

It's all about eyes by Marcel Proust. Not always where we go or how often....but what we Bring.

And, Brooke, you are sharing element of YOUR unique journey, yes? Big part of human discourse. And I find them, as I always do... worthy of interest.

You already know my take on "correct' info.....and have even indicated you get it.

---------- Post added at 08:29 PM ---------- Previous post was at 07:02 PM ----------

Originally Posted by bil

Ummm yes. Out here things are a bit casual. She just shot him up, rolled him onto a cloth on the terrace floor, set up a localised sterile area and snipped away. In her defence, the blood stains were small. She is known as the queen of castrators, and does a lot of horses. In the south of Spain in Andalucia, the men are very often very macho and butch, but she sees quite a few of them faint dead away when she gets down to business.

Your comments remind me of a very good article I read a while back, I think entitled 'how to kill orchids' which was very well written and nicely observed. In there the writer pointed out that with the best will in the world, what works for one person won't work for another as the conditions are different in almost every case.

Here I am pushing my luck a bit, I know that. The summer is hot and dry and the winters can be cold and wet, but inbetween, it should be fine. I have always found orchids fascination, and I figured that if I never tried, I would always regret it. So, I have a small collection of Cats, Cymbs, dendrobiums (mostly rescued from dire straits and visually only fit for compost) Phals and a couple of vandas. It may be that some won't do very well, but if that is the way it goes at least I will know which type to focus my efforts on. I have spent the bulk of my life proving people wrong when they said I couldn't do something, so we shall see.Wish me luck!

This vet sounds amazing. Fierce, original. Should be considered for a reality show if she might agree; I would love the privilege of being witness to all she does.

Indeed, never seat strangers on the bench in YOUR courtroom, especially despots and cowards/bullies. You belong on that bench, nobody else.