My indoor basil plant has been forming these brown beads on the bottom of leaves and on stems. I think it might be sap that's been oozing out that's turned brown / hardens when exposed to air.
In the photo, you can see:
- the brown bumps on the stem (center)
- the brown bumps / sap on the underside of a leaf (right)
- sap (before it turns brown) on a leaf (bottom)
I also notced that a lot of the green leaves have tiny yellow/white specks (you can see it in the leaf at the top of the photo)
I've checked, and I can't see any visible insects / parasites.
Does anybody have any ideas what's going on? What should I do?