Spinosad will kill them in one shot. I have had them a few times. So far they are my most favorite problem to have. By that I mean I have had PM, Spider Mites, Fungus Gnats, and Thrips. Fungus Gnats don't present much of a problem to me, Thrips, I am not sure where I get them from. I have read of moths carrying pests. There are a lot of moths where I live... who knows? The other two are more of a PITA and require more intensive therapy lol. If using spinosad DRENCH the plant. Make sure you get the whole plant and it is dripping. You don't have to go more than that.