Brown lesions on underside of palm leaf

[Melinda G]

I am new to palms and need help identifying what is causing these lesions so I can appropriately treat. Please help! 

Pelagodoxa in container, kept under an overhang, protected from wind, gets partial sun throughout the day. Numerous, very small, raised, brown spots, many of which have a pale tan, pinpoint center. They are only located on the underneath side of the oldest leaf. They seemingly came on quickly although I admit I had not paid as much attention to that leaf as it seemed to be the older, brown leaf that was on its way out. When I look closely at this leaf, the leaf base does have some residual green color so maybe it browned prematurely? I don't know. The lesions are easily removed with my fingernail. 

I tried researching some things (graphiola?) but nothing visually appears identical to what I am seeing. I appreciate any input from anyone with more experience! Thank you in advance!

[Steve Mac]

 @Melinda G It looks like scale to me. It is usually easily treated with a cheap, low toxicity, oil based product specifically for scale.

It can deform and kill young small leaves if highly infested, but usually if present in small quantity will have little effect on a big palm.

It is hard to get rid of completely, but you don't usually need to. Ants sometimes encourage it too.

I would guess that the scale has not killed that leaf but it is at a level where you should be spraying it to reduce it's prevalence.

[Melinda G]

@gtsteve  thanks! I had recently started to see some small, white scale on a few of my smaller Pelogodoxas, and I’ve been gently wiping them off with a damp cloth or a q-tip. I also treated around them for ants and have sprayed a few times with dilute Organicide. I’ve noticed a definite improvement. Would this be an appropriate approach for this bigger one as well? Thanks again. 

[Steve Mac]

Yes, that should fix those little pests.