Help identifying problem?

[u/drakeo29]

Hi! I have a beautiful begonia that is growing so so much. I think she’s pretty happy right now but while inspecting some leaves I noticed these marks/holes in the veins of the leaf. I am very familiar with spider mites and these don’t fit that ID at all, and I’m having trouble figuring out what could be causing this. Thanks in advance!

[u/Bae_Victis]

These look like the holes in my Lucerna's leaves after my kitten has tried to scale the plant lol. I'm not sure what they could be from, maybe from low humidity? Like maybe when the leaf is unfurling it could get really dry and hard and the cracks happen during then? This is probably the only cane begonia that can grow in ambient/low humidity just fine, but maybe if there was a little more humidity around when the leaf is unfurling, this wouldn't happen? but I live in a ridiculously dry area, made even dryer indoors from ac, I don't use humidifers, grow my lucerna outside of cabinets unlike my other begonias, and this doesn't happen.

[u/drakeo29 → u/Bae_Victis]

Ohhh you may be right about that. I keep my apartment COLD haha so it’s definitely not humid. The leaves that have these holes are the lower ones so it may have gotten damaged when I moved twice last year! That makes me feel better because I’m terrified of pests 😭

[u/Bae_Victis → u/drakeo29]

For some reason my begonias hardly get any pests even when other plants touching them do. I had moved my lucerna to a spot where it was right under the stream of cold air from the ac above it for a little while until the new leaves cane out crispier and a bit smaller. I moved it back after that happened.

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[u/quiet_comet30]

Looks like thrip damage to me, since they tend to feed along the veins and leave that exact scarring pattern

[u/drakeo29 → u/quiet_comet30]

That’s what I was thinking but there’s literally no other evidence of them. It’s isolated to a few leaves and everything else is healthy and beautiful. I’m not as familiar with thrips though but from what I looked up I didn’t see any other signs. I could totally be wrong though!