moderator:
I don’t think the size of blemishes on an esrog has anything to do with “nireh loeinayim”, but rather, “hodor”. In other words, blemishes which are invisible at arm’s length are not considered to diminish the esrog’s beauty.
If I’m not mistaken, the reason that Wolf’s observation is not inconsistent with Rav Carmell as quoted here, is that when the eggs are laid, they are micrscopic. It then grows, and gives parnossoh to nit checkers.