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my areca has developed these white spots on its leaves and stems. I had wiped out most of the ones on the leaves a week back, with neem oil solution. I spotted these on the stems today. Are these scales? Would wiping these out with neem oil help with keeping them away? Should I do the wiping regularly, weekly maybe?

Also, one frond has turned yellow (towards the bottom and old) and some others are gaining yellowish shade, although I doubt it could be for an unrelated reason.

When I got the plant (almost 2 months back), the stems had the whitish powdery look(more or less the same as seen in the pictures, I didn't spot any clear spots though), but, on a little browsing it seemed to be normal, so, I ignored it.

My soil mix consists of 75% cocopeat, 25% soil. I had fertilized when first potting it and again two week ago. I keep it near a south-facing window (dim light), and shift it to east-facing balcony every now and then (for 2-4 days period). I've probably over-watered it a couple times, as the soil never really feels much dry.

I'm attaching a handful of pictures below.

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Thanks.

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This is mealy bug and hard to get rid of on palms as they hide in the leaf sheaths surrounding the new growth.

More details are here but soap and water or neem oil applied at least three times at five to six day intervals are where you want to start.

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