I used google lens...
This came up:
"wax ducts, wax threads and glandular deposits from whiteflies"
If it is whitefly... Ladybugs are your friend.
https://www.royalqueenseeds.co...
Ladybugs, lacewings, and predatory mites prey on whiteflies and their eggs. If you haven't already, we highly suggest introducing these insects into your grow environment as they'll help you control a wide variety of pests (including spider mites).
We suggest beginning with ladybugs, as these are some of the most ferocious insect predators out there. You can even buy them in tubes from garden centres. They tend to disperse within a day or two, though, so it might take several batches to fully eradicate a whitefly infestation.
