Catasetum bulb black spot

[silanah77]

Originally Posted by SouthPark

Silanah -- I took this photo this morning .... attached. The rot region totally dried. No issues with the bulb. The original grey brown region has become a dark brown dried patch. None of my other catasetum orchids had this.

The cause wasn't sunburn. And the original ominous colouring was exactly like that in your photo. My application of yates anti-rot phosacid stopped the attack of whatever it was.

Thank you, SouthPark for the photo! I'm happy that you save your orchid - it looks very good! I think my patches were a little different and l'm pretty sure that they were because of overwatering-I just didn't have to spray water on the roots the last time before my vacation...Anyway, now the plant is dormant, I don't see any black spots any more. Although the orchid doesn't look as pretty as before, I hope to save it. Thank you again and have a nice day!

[SouthPark]

Originally Posted by silanah77

I think my patches were a little different

Most welcome silanah. The colour of the patches (originally, when I first encountered the issue several months ago) - not shown in the photo that I took this morning - were exactly the same tones and colour as you showed in your original photo.

In the photo that I uploaded, the patches are now dried to a dark brown colour. The regions remain sunken-in a little bit, but totally dry and hardened up.

Nice to hear there are no more blackening regions with your bulb!

[silanah77]

Hello again everyone! I just wanted to share with you that I've got a new growth on my damaged bulb. The older bulb is already very shrivelled. I keep the plant on a dry sphagnum moss in a warm place with light(but not direct) and I give a little moist on the sphagnum moss around the plant, but not under it. I have some worries that maybe the new growth will not receive enough energy and will die, so did anyone of you have such experience? What can I expect? ...also the last bulb that I cut has again those black areas-they can be seen in the photo...

[Roberta]

Put the plant back in its pot and leave it alone now - the new roots need to grow undisturbed. A little moisture on the moss is OK, but don't over-do it until the new growth and roots are well-established. It is great that you have a new growth - At this point don't worry about the old pseudobulbs. The new growth will suck the energy out of them to grow roots then leaves, so will renew itself as these Catasetinae do. In a year the old ones may well be brown and shiriveled, that's OK.

[silanah77]

Originally Posted by Roberta

Put the plant back in its pot and leave it alone now - the new roots need to grow undisturbed. A little moisture on the moss is OK, but don't over-do it until the new growth and roots are well-established. It is great that you have a new growth - At this point don't worry about the old pseudobulbs. The new growth will suck the energy out of them to grow roots then leaves, so will renew itself as these Catasetinae do. In a year the old ones may well be brown and shiriveled, that's OK.

Thank you, Roberta for your quick response! I'll do this immediately! Have a nice day!

[isurus79]

Originally Posted by Roberta

Put the plant back in its pot and leave it alone now - the new roots need to grow undisturbed. A little moisture on the moss is OK, but don't over-do it until the new growth and roots are well-established. It is great that you have a new growth - At this point don't worry about the old pseudobulbs. The new growth will suck the energy out of them to grow roots then leaves, so will renew itself as these Catasetinae do. In a year the old ones may well be brown and shiriveled, that's OK.

[silanah77]

Hello again, everyone! I just wanted to ask you another qestion-this is the very first bulb of my catasetum, that I had to devide, because the second one became shrivelled with black spots. So the first bulb is on its own and the second and the third(which I cut) are together too. The third one had new growth-I put it in sphagnum moss and it is ok for now. But now the first one has new growth too. The question is that it is not from the bottom, but higher on the plant. So how to pot this one-should I put the bulb deep in the media? For now I put it in a "terrarium"-I saw it in a video in the net. I'm trying to help it somehow with increasing the humidity. Do you think it is ok in this case?

[isurus79]

Originally Posted by silanah77

Hello again, everyone! I just wanted to ask you another qestion-this is the very first bulb of my catasetum, that I had to devide, because the second one became shrivelled with black spots. So the first bulb is on its own and the second and the third(which I cut) are together too. The third one had new growth-I put it in sphagnum moss and it is ok for now. But now the first one has new growth too. The question is that it is not from the bottom, but higher on the plant. So how to pot this one-should I put the bulb deep in the media? For now I put it in a "terrarium"-I saw it in a video in the net. I'm trying to help it somehow with increasing the humidity. Do you think it is ok in this case?

I would pot this up in a sphagnum fill pot on its side. Make sure the bulb doesn't wobble by using stakes to hold it in place.

[silanah77]

Originally Posted by isurus79

I would pot this up in a sphagnum fill pot on its side. Make sure the bulb doesn't wobble by using stakes to hold it in place.

Thank you, very much for your reply! I'll do it Have a nice day!

[isurus79]

Originally Posted by silanah77

Thank you, very much for your reply! I'll do it Have a nice day!

You're welcome!