Yes, I had some little worms eating my Ballyii. It was 2 or 3 years ago, seems like they were leaving some sticky mess. I spray my plants with Bayer 3 in 1. Haven’t had any more trouble with worms.

Once in a trifaciata. Used a syringe to inject olive oil in the space and wrapped it tight with electrical tape. Oh, and in a cactus.

I had webbing and a worm/caterpillar eating my Rhipsalis gaertneri. The black spots are worm poo, I guess

Very similar akrrm. I would see it in a fatter variety like cylindrica, francisii, or ballyi before a trifasciata... weird. Of course, the Christmas cactus is probably as thin as a trifasciata leaf. I think I'll just stick with manual removal until I have a serious issue, I'm not fond of using chemicals even though I have resorted to it somewhat in the yard this year... weeds are getting out of control.