Brown spots

[Zoey339]

Anyone know what this is on my paphiopedilum? I've had it for 3/4 months and these spots are just showing up in the last few weeks. Theres one big spot on a newer leaf. And had a few on an old that came off. And noticed new spots forming on another leaf about the size of a small pea. Sun burn? It doesnt get a whole lot of light and the paph right next to it seems to be fine. I'm afraid it might be something worse. See pictures. Thanks

[Ray]

Hard to say for sure, but I suspect acidovorax - a.k.a. pseudomonas. If so, it is a water-borne bacterium that typically starts with a ~1/4" spot, then gets brown around it.

Remove damaged part of the leaf and treat the plant and growing area with a disinfectant like Physan or just plain bleach in water (1 oz/gal). Copper-based treatments like Phyton should cure the plant.

[Zoey339]

Originally Posted by Ray

Hard to say for sure, but I suspect acidovorax - a.k.a. pseudomonas. If so, it is a water-borne bacterium that typically starts with a ~1/4" spot, then gets brown around it.

Remove damaged part of the leaf and treat the plant and growing area with a disinfectant like Physan or just plain bleach in water (1 oz/gal). Copper-based treatments like Phyton should cure the plant.

Thank you. Stupid question. How do I treat the plant? Do I need to un pot it and wipe everything down or soak it? Do I just add that to the water?

[Ray]

Physan or bleach are topical only - killing pathogens on the surface - so you'd mix it up and spray all surfaces.

Phyton is applied the same way, but is systemic, so kills internal pathogens, as well.