rot on paphiopedilum leaf
I just noticed this today. I'm not sure what the initial cause was as I'm fairly obsessive about keeping water out from between the leaves. Its last watering was 2 days ago, a mealybug treatment applied to the media as a preventative measure. I've seen no bugs on the plant. Most the area is dry to the tough but there was a single sticky spot underneath the leaf.
I'm not entirely sure what to do here. The last time I had a leaf go like this it was at the bottom of the fan. I basically pulled it off and kept the area dry-ish for a week or two and all was fine. Also disconcerting is that it appears it may have spread to the leaf below it. Any suggestions on how to go about saving this plant?
The plant is growing indoors with supplemental lighting, 65-75° F, 55-70% RH, gentle airflow from nearby ceiling fan, watered every 3-4 days, top layer misted/sprayed in between if it gets dry.
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