0soyoung
Imperial Masterpiece
Could be, but probably not.Those tiny white specs...is my questioning...aphids?
The leaf damage is not like that caused by any sucking insect. They insert their stylets into phloem tubes and drink up the sugary fluid (photosynthate). Aphids aren't much for sun tanning, so you find them on the underside, lined up on the central leaf vein, along the petiole and young tender stems. Aphids typically cause the leaf to curl with the leaf underside to the inside of the curl. They don't hang out near the leaf edges just because the pickings, there, aren't so good.
But we see these leafs are damaged toward the tips and margins. So, IMO, it is more like those things are there because of the damage as opposed to causing the damage, aphids or not.