help ID'ing the "disease" in my trichs

[GreenFingers]

Hey everyone I was hoping someone could help me with a small dilemma I'm having. So over the last couple months one of my favorite peruvians has developed brown spots that are slowly moving up the column. So far as I can tell it's only cosmetic but it's still worrying me.

I first figured it was just signs of stress from a unknown reason maybe a accidental fertilizing with too much nitrogen. It seems to slowly grow on one plant and very rarely move to other plants but I am seeing signs of it on a few plants in the same general area.

I also had this happen to another trich at a different location not to long ago that someone suggested might be fungal or viral. I isolated that one plant but it has shown no signs of getting any better.

The first 2 pics are the cactus I noticed this on first several months back. The next 3 pics are the 2 peruvians who now seem to be going through the same thing.

So please any expierenced members with a proper ID and or a way to treat this I would GREATLY appreciate your help. Thanks again

[bardo]

I have a couple of plants that have something that looks similar to yours, I have no idea what it is but it doesn't seem to cause any long term problems for me so I don't worry about it, I know that isn't much help sorry. The cactus in the 3rd and 4th pic looks like a beauty of a plant : )

[Evil Genius]

That´s not a disease...that´s corking. Caused by stress and not a pathogenic problem. More of an aesthetic one.

The alternative would be scale or a fungal infection, but I don´t think that´s it. Can you scrape it off? If you can, it might be scale. But I am pretty sure it´s corking. Just try to improve the growth conditions to avoid something like that in the future.