Hello everyone,
I have been reading you for a while now. Never had the guts to write but I think itīs about time because I have done a lot to combat the unknown. I hope you have some encouraging answers.
There are several issues I would like to discuss with you but for now there is one that is killing me.
For a year maybe, I have been fighting something I thought was some kind of fungus on an orchid that has never bloomed (I think it's a Cymbidium). The leaves began to brown up from the margins. This thing tends to spread toward the center of the plant. I used a fungicide sold in my country called Derosal, active ingredient carbendazim, it is a benzimidazole.
It kind of improved the condition but not entirely. Then I bought what I think is either a Maxillaria or Rodriguezia. It got it too.
Then another cymbidium which I keep in my room (apart from these other two) started to show the same. I thought I could keep it under control since none of these have died.
Oh also, in both cyms and in the maxillaria I have noticed some spots which lack green colouring.
I bought a Zygopetalum redvale fireburst. It got it. this last one has presented these simptoms much faster. I really fear for this one.
Some additional treatments I have tried are:
Physan 4ml per liter.
Leaf trimming each time I see the brown/black rim followed by cinnamon covering of the wounds.
3 days ago I tried the listerine sprinkling along with physan drenching and cinnamon altogether. Today the Zyg is already showing brown rims where I cut before.
Iīve got 12 more orchids, none of them with this thing I donīt want it anymore and I realize I donīt really know what it is. HOPE IT'S NOT A VIRUS!!!!!!!!
Here are some pictures. I attached them in the order I mentioned them in the message.
Thank you and don't hate me for letting this go so far
Brown and black leaf margins
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