It looks like you may have some EB also The brown areas with the yellow around them is probably EB and those spores are usually in the soil and splash up onto the plant which is why EB starts at the bottom.
As far as I know LB does not cause any yellow leaves. At least it never has for me. I just start seeing irregular brown blotches and Poof! within a week the plant is dead. I tried cutting off the infected leaves and branches the first time I ever saw it but it was no use, the plant died anyway. Now if I see LB I immediately remove the plant to avoid spreading the spores which will develop under the leaves and look kind of whitish and fuzzy. Like I said - it's a killer.
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