Looks like it could be thrips, to me. I don't see any in that picture, but the damage looks similar to what I have observed. More pictures would be helpful.
Looks like it could be thrips, to me. I don't see any in that picture, but the damage looks similar to what I have observed. More pictures would be helpful.
I have 3 plants, 29 days old that look like 8 days old. My yellow traps are filled with these black, tube like insects. They look exactly like those in your photo.
Could also be the start of sooty mildew possibly caused by aphids. The white debris looks like the hatched eggs. Maybe? Maybe not. I would spray with neem oil if still in veg.