black and brown spots

[Wouter]

Hey guys
Three weeks ago i bought a new masdevallia and a Restrepia on an orchid show.
Luckily i kept them seperate from my normal growing space because during the last two weeks theres been an explosion of black and brown spots. I think its two different problems.
Can anyone confirm if it is rot or fungus or...?
I have been spraying it once every 3 days with a fungicide based on alkyldimethylbenzylammoniumchloride and raised the air movement.

[Don Perusse]

Can't say for sure what your problem is, BUT I think you are on the right track. I usually use RD-20 to spray my entire collection about once a month or so. This product is a disinfectant for use against fungal, bacterial, algal and viral plant pathogens. Hope this helps. I don't know if it's available where you live.

[Ross]

Does look like rot to me. Thiomyl is pretty effective at stopping the rot if the roots are still viable. It's a systemic.

[whygreenberg]

Masdies, and I would imagine others in the Pleuro alliance too, will easily get this kind of fungal spotting if they are not getting enough air movement. Sounds like you are on the right track with stopping more of it.

[Blueszz]

Hello Wouter,
I think you got some pretty good advise. I hope your plants will recover soon!
Just wanted to say welcome on OB and "hi" from the Netherlands.

Nicole