Is it a fungus or is it eggs inside the new leaves?
I have a rather large (4ft square) umbrella plant. I have had it for nearly 5 months and it has been great. I repotted it after buying it and it is growing at a fair old pace. However, in the last 2 weeks, all of the new leaves (and only the new leaves, the old leaves are completely healthy) are growing with what looks like little brown spots or dimples inside the leaves. The spots are visible from the front and back of the leaf (and seem to be inside the actual leaf) and on some has spread down the stalk of that leaf (again not onto any healthy old leaves). I have tried not watering it, watering it more, misting the leaves, a fungal spray, a vitamin spike and an insect spray. So far none of these things have made a blind bit of difference. The plant is in an air conditioned apartment but is not in a direct breeze, it gets lots of light but no direct sunlight. Any help/advise gratefully received.