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:
