There was a pretty large thread regarding this same very issue.
I have the same thing. I went a head and removed it. The first signs of it did not seem to affect the plant, then I noticed some leaf curling around the Purple/Black. So, Like I said I just went a head and snipped it.
Here is the link to that thread. Long read, but very informative
Has anyone seen this issue before? Temps have been hot: 28-31C Day / 15-22C Night with 75-85% humidity Avg. Appears to be affecting all plants in the garden except a freezeland/timewarp strain that had flowered itself and was in and out of veg/flower all summer. Other than that some 15 or 16...
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