Alocasia brown spots

Pale stippling and dusty undersides suggest mite feeding; silver scuffs and black specks suggest thrips. Examine the veins and petiole junction before attributing spots to watering.

Dry patches after exposure

Compare exposed and shaded leaves. A fixed papery patch following stronger sun or cold contact can be injury. Move out of the damaging exposure and retain the healthy blade.

Wet-looking or enlarging lesions

Separate the plant, keep foliage dry, and photograph the border to track spread. A yellow halo does not identify a pathogen. Check roots too if there is whole-plant wilt or yellowing in wet mix; those symptoms need more than leaf cleanup.