I did a search on the site for any threads about this, and couldn't find any. If I missed something, please point me in the right direction.
Anyway, my ventricosa has always grown very well since I received it a year ago. It has not pitchered for me in several months, but the leaves have been healthy. It lives inside my apartment on a sill facing an east window. I realized recently that the lower leaves have developed what I think is rust on the underside of it's leaves. One leaf has turned yellow and started to blacken at the tip. I cut that one off. The top 3 leaves, including the growth point, are fine but I am afraid that the rust stuff is spreading.
Does anyone have experience with dealing with rust on their nepenthes? I have 3 other plants next to it, none of them exhibiting any of these same rust spots. I have a systemic insecticide but that's it. If there is something else I can purchase that would be gentler to the plant, I would love a recommendation. Thanks in advance!