Help! My catasetum is rotting

[jimmy0123]

One of my catasetum is rotting can anyone help me what should i do to save this plant. I place this plant outside and recently it rains a lot but once i saw this rot i immediately kept it out of the rain.This is my first try at catasetum so any suggestion is welcome.

[digitalgate]

Take the whole plant out. Cut all the root away , replant into two pot the younger keiki into another pot. That pseudobulb rot could due to 1) mosquito 2) weevil. Cut into the rotting pseudobulb and find weevil larvae and kill it. If cannot find it - good news. If you find one larvae , look at all your plant and look for tail tale sign of weevil damage.

[LouisW]

Whoa! Hold on!

No offense digitalgate, but before you go and rip the whole plant to shreds, you should take a close look at the damage. To me it looks like an isolated patch of rot, which is a problem but not that bad of one. You can remove the rotted section, or if need be the whole bulb. Remove the soft tissue until you start cutting into healthy green tissue. Cover the whole wound with cinnamon. Hold back on watering a little.

In Malaysia I imagine things don't dry easily, so you need to be extra careful with your watering. Early morning is best so the drops on the leaves and bulbs have the whole day to dry. Just try to make sure there is no water sitting on the plant. If you get rot in the center of the growth it will be a bigger problem and you will lose the whole growth.

[jimmy0123]

I read in this forum that sometime this sp tend to 'eat' the old pbulb i wonder if this is the case? Hopefully this Is the case i really hate rot...

[digitalgate]

trust me, this is a better way. Bacteria rot spread in 1 or 2 day in our weather. fungus just as fast. With the recent weather rot spread even faster. I just finish cutting around a thousand (yes a thousand) cutting after 2 months. I see weevil everywhere. But the good news is i dont see weevil damage on the leave. Chances are you can be quite safe cutting the one inch below the rot. But i play it even safer. I rip the whole pseudobulb away as the photo might have been taken a day before. So by now it is pretty advance. you have to be drastic in your approach. Catesetum grow and flower faster than dendrobium so the wait, probably is only a year down the road.

use physan to control the rot from spreading.

you can also try spray the cutting one inch below the rot that is if you do not intend to cut the whole bulb away.

[rcb]

Originally Posted by jimmy0123

I read in this forum that sometime this sp tend to 'eat' the old pbulb i wonder if this is the case? Hopefully this Is the case i really hate rot...

Yes they can and do. But your picture absolutely does not look like that. Sorry it looks like rot.

I would not separate the new growths completely if I didn't have to, but I would totally remove the rotting p'bulb, and hopefully the new ones will still be attached to the good old one. Treat with your preference and I would probably repot.

BTW, I've never had any type of rot like that on any of my Ctsm alliance plants, I have no idea why it would go like that.

[jimmy0123]

Just removed the rotten part and sprinkled some cinnamon (spilled some on the root hope it is ok). I aspect the rot to be worse than yest but it seems to be the same, just a spot.

[orchidaddict789]

Looks good--there's still the bottom part of the bulb and the part that holds all the growths together. The plant should be fine.

Once I had rot progress to the rhizome and the plant basically fell apart in my hands.

[kmarch]

Looks like you've done a good job jmmy. Please keep us posted on its progress.

[LouisW]

Looks good to me too!

[stefpix]

Do you have any updates? I was given a Catasetum backbulb with 2 growths. The roots are 2 - 3 " long. the end piece of the old PB inside the pot became soft. I cut the part to healthy green. there is just about 1 " or less of the old PB with 2 growths attached to it and a 3rd eye. Is it enough for the new growths to develop?
I just put it into an empty clay pot. when can I start watering?

stefano

[jimmy0123]

Originally Posted by stefpix

Do you have any updates? I was given a Catasetum backbulb with 2 growths. The roots are 2 - 3 " long. the end piece of the old PB inside the pot became soft. I cut the part to healthy green. there is just about 1 " or less of the old PB with 2 growths attached to it and a 3rd eye. Is it enough for the new growths to develop?
I just put it into an empty clay pot. when can I start watering?

stefano

Ever since the treatment, it has been growing fine and also show sign of new growth (will post pics later). I hold back watering for a few days before continue with my watering regime. Lets wait for the experts to comment on this.

[jimmy0123]

Here is the pic. I mounted it after it recover and now is doing fine

[stefpix]

thanks. looks good. what did you mount it on? no sphagnum around the roots?
stefano

[jimmy0123]

Originally Posted by stefpix

thanks. looks good. what did you mount it on? no sphagnum around the roots?
stefano

I mount it on a piece of wood that i have after trimming my huge fruit tree. I did not put spahg moss so it can be more on the dry side when they dormant (it can rain a lot at a time and this will disrupt the cycle). The moss on the right side belongs to another orchid i mounted on