Tropicals & Tender Perennials: Help - damage on leaves, 1 by heather_v

heather_v wrote:
I'm really new to brugs, and I'm having a problems with the leaves on a couple of plants. The picture isn't the best, but I can't get any closer without the flash washing out the leaf. So I'll try to describe it, too. The leaves in general, look ok, they're not yellow or falling off. These are still small plants which haven't Y'd yet, about 15-18" high each. On the more mature leaves, there are silvery spots/almost translucent where it looks like maybe part of the leaf is gone, but it's not a hole. And then there are tiny little black spots on or near the areas where this is happening. It only seems to be on the top of the leaf.

Is this an insect doing this, or something else? How can I treat it? I thought maybe spider mites, but there is no sign of webbing anywhere on the plant, and nothing seems to fall off when I tap it.

I hope someone can help. I really don't want to lose these brugs that were so generously offered by Callalily a while back.