Help, great problem! - Orchid Board

corina · #1 01-25-2010, 04:57 AM

I have 10 cyms for 5 years, and i love them, so they reward me with great blooms every winter.
One of the ones i got befor Christmas from my husban, has started to blacken, first the outer leaves of an older bulb, but now also the new growth. I do not spray them on the leaves, and the tempetarues are around 15 C .
Please help, i do not want to loose it and i cannot understand what is the problem.

Thank you.

King_of_orchid_growing:) · #2 01-25-2010, 05:07 AM

How often are you watering them?

corina · #3 01-25-2010, 05:09 AM

About once a week, but not too much, now the light is not so bright. I looked into tha pot a little and the roots seem to be ok. Should i make some more pictures?

King_of_orchid_growing:) · #4 01-25-2010, 05:14 AM

Cymbidium hybrids can handle very bright light. Growing in low light might be part of the problem.

I suggest cleaning the plants up. Remove the rotting parts of the plant.

If you're able to find a very sunny place that receives indirect light that'd be a good start.

corina · #5 01-25-2010, 05:20 AM

Thank you very much. The problem has advanced on the new growth in a few days, it is very fast.

King_of_orchid_growing:) · #6 01-25-2010, 05:30 AM

Yes, it can be!

Just a reminder, sterilized tools in cleaning please.

If you have any other questions, go ahead and ask.

corina · #7 01-25-2010, 07:13 AM

I did it. I cut the affected part, one older psb and the new growth. The new one was wet and mushy inside, in the lower part, it came out easily The older one was black outside but firm, and it had good root system.
I sprinkled the remaining scar with a fungicide and some cinamon. Now i hope its over.

Nico · #8 02-14-2010, 12:59 AM

I am a beginner in cymbidium Corina. I killed 2 of them. I can't give you an advice, but good lack! (or finger crossed!)

Des · #9 02-23-2010, 06:22 PM

It sounds as though the the plant has been infected with a bacterial rot , this is usually means the end of the road for that plant !! it can be very infectious ,so be careful . Disinfect all your benches and I find it best to repot and sterilize all the Cymbidiums in the immediate area of the infected plant.

DendrobiumFan · #10 02-23-2010, 08:04 PM

See if spraying some peroxide on the affected areas improves things. I do know that peroxide has been used successfully in treating crown rot, also a bacterial infection. I have also heard of people spraying the root system during potting with some peroxide. It won't hurt the plant, and may perhaps help.