Quote:
Originally Posted by K-Sci
If the tissues didn't actually freeze, and this looks to be the case, the dark areas are almost certainly infected. Given that this is a dowiana hybrid, it most likely carries the notorious dowiana susceptibility to rapid collapse from infections. If it were mine, I'd do four things:
1) Cut off the infected parts such that 100% of the infection is removed.
2) Wipe down the entire plant with isopropyl alcohol or another disinfectant, and dust the cuts with a broad spectrum orchid-compatible fungicide such as Thiomyl or Banrot, or possibly a copper-based treatment. If you don't have a fugicide you could take a chance and use cinnamon, which will help dry the cuts and might possibly also help prevent infection.
3) If possible, treat the entire plant with a systemic fungicide such as Thiomyl (available at Amazon in the US).
4) If you have not already, move it to somewhere warm (well above 65F, and higher is better).
If Thiomyl isn't available today, you could use a copper based treatment such as is made by Ortho, which can be found in a store.
-Keith
|
I do have Thiomyl in large quantities. I guess the bulbs are more or less tan and mushy rather than black. I was hoping that maybe they would dry up on their own and not spread to the other parts of the plant as that sometimes happens especially with dendrobiums I have had. It is around 48% dowiana though. I just was worried about being too aggressive with it and ending up making it worse.