What's wrong with my Dendrobium leaves?

[Lady Oscar]

My Den. suzukii x Den. tobaense has been growing new leaves for a bit, but I recently noticed that the newest ones have some sort of damage (the older ones are fine). Does this look like damage from some sort of pest or disease? It has a new little cane growing, so I'm worried whatever it is will spread.

[estación seca]

I would look carefully for spider mites.

[Lady Oscar]

I don't see any webby stuff, or any mites through a magnifying glass, but I'm not entirely sure I'd know what I was looking for. I wiped the leaves with some insecticidal soap and will hope that takes care of things. Agh!

[AJW]

If the photo shown indicates that the blemish is both sides of the leaf it could be a snail or slug. mini "Garlic Snails" can cause similar looking damage. Rather like a lawn mower shaving the leaf. Try a general purpose spray oil (20mls) and meths (40mls) to a (Lt) of water

[Lady Oscar]

It is in fact on both sides of the leaves. Is "meths" methanol (methyl alcohol)?

[AJW]

methylated spirit

[wintergirl]

Originally Posted by Lady Oscar

I don't see any webby stuff, or any mites through a magnifying glass, but I'm not entirely sure I'd know what I was looking for. I wiped the leaves with some insecticidal soap and will hope that takes care of things. Agh!

Not sure if you would see mites with a magnifying glass unless it was magnified at about 500 times. They are very small on the digital microscope.

[Lady Oscar]

Originally Posted by wintergirl

Not sure if you would see mites with a magnifying glass unless it was magnified at about 500 times. They are very small on the digital microscope.

Good to know! I was trying to find a scale with any of the pictures, but failed. ^^;

[Lady Oscar]

Heh, I'm still not sure what caused the leaf damage, and the new leaves and new cane look fine, but I was just startled to find a little friend on the plant! Hopefully he'll eat any pests hanging around....

[charlesf6]

Some friend