Hey folks seems I have some visitors. I’m not having much luck with an id because I don’t see any bugs, only their sign.
There are 12 ladies in the room, they are otherwise healthy besides 3 or 4 of them and only then it’s just a few places that look like this on the leaves of the lowest branches. Running SoHum soil and water, they are still in veg but need flipped in the next couple weeks. What did I leave out?
Thrips indeed. The light residue is dried plant sap, they scrape the leaves and feed on the sap. The black dots are excrement. If you are in the US, treatment is simple. Use a spinosad product like Captain Jack’s Dead Bug Brew. Follow the directions on the bottle.
If you haven’t killed them they are still there, so no next time. They hide down in between the joints of the leaves and stalks and underneath the leaves. When spraying spray under the leaves first and then the stems and tops of the leaves, every 3-4 days for for 3 weeks as well as the top of your soil in the pots.
As others have stated - thrips for sure - spinosad will get the job done. Spray at lights out, don’t spray in flower. Spinosad is a translaminar pesticide, which means it is locally systemic. Get good coverage, but you don’t have to get every little speck to kill them. I’ve had good success doing two applications one week apart. hth.
Thanks y’all, the ladies and their pots have been sprayed with spinosad, next Tuesday they’ll get another dose. I’ll likely hit them later this week with Mammoth P Bio defense for good measure.