For the last year or so off and on there has been a strange discoloring and speckeling if you will, of one or a few of my nepenthes' leaves, it only happens on some leaves, and then it stops, I recently started treating with neem and that only seemed to be too little too late as the leaves that were effected soon blackened, The condition starts up for a month or so, then stops, all the new growth is unaffected, then it starts again, only hitting one or two leaves at a time, This happened in the old pot it was in, and in its new pot wioth new substrate. I noticed it starting again on some leaves since the last treatment, I have a pitcure of a leaf last time that it happened...maybe someone here can ID this better than i can and give me a good idea of whats up. There are no visible pests on the plant itself nor in the spotting meduim...and it is so sporradic that i just dont know what to make of it. The plant sometimes pushes through and pitchers even with this happening, other times it just kstops growing for a while, what is stranger still is that this nep is near other neps that are not affected at all by this.
here is a picture from the last time that it happened, and i will try to get a picture from the most recent outbreak, as its still a small amount of discoloration, and may be i can treat it and actually stop whats happening.