I need some help with a Cymbidium ensifolium that I own. One of the new growths (which is starting to form its pseudobulb) has recently begun to develop small brown spots along the edges of the leaves. The growth isn't rotting, so I'm fairly positive that I haven't gotten water in the developing leaves. I can't tell whether the damage is from too much sun (it's in a west-facing window--northern hemisphere--and only receives direct late afternoon sun for a couple of hours a day) or from a bacteria or fungus. The spots aren't regular in shape (that is, they aren't perfect circles). Odd as this description may appear, it looks like the new growth has been spattered with tiny flecks of dirt. All of the other growths (i.e. the mature ones) have beautiful leaves without any kind of spotting). I don't use any kind of chemicals to treat my orchids, but I'm almost willing to break my own personal rule and enlist chemical help as a last-ditch effort to keep the ugly spots from spreading (or worse, destroying the growth). Any advice from those of you who have experience with Chinese cymbidiums will be greatly appreciated.
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