Hi there. My yucca is doing OK, but some of its leaves are clearly diseased. I've been trying to identify the disease but it doesn't exactly match anything I've found on the internets.

Is it a pest? Bacterial infection? Fungus? How to treat this? Please help (thanks!! :D)

Bottom of the leaf, against the light:


Same leaf, as seen from the top:


Close up, top side:

Hey, still a very nice looking plant.

Quiet in here, maybe some vacations, so hopefully someone better comes along.

I'd agree with the chomping, and some serious sucking.

Closest I could find to your first few images: https://www.deltadawngardens.c... using "yucca white spots insect" on google images.

Seemed like a good article but I just glanced and am not vouching for them, haven't encountered this myself..

That said, they seem to be tying this pest Yucca Plant Bug (Halticotoma valida) to soil conditions after being root-bound. Might be worth a read.

Sorry I can't be more helpful but this seems like a possibility.