Well, in my scenario, two treatments with the nematodes allowed damn near everything enough breathing room to get some good growth on. The mother still looks like shit, for which I hold my head down in shame and frustration--why would the most mature plant in the room suffer the most? I also used the cinammon, but was in a huge hurry because Dave was called in earlier for his surgery, but things smelled really good when I was done and I see many fewer fliers (didn't notice any yesterday, in fact). The cinnamon seems to have had the most immediate effect.
I was hoping DiPel would be the ticket, but it's the wrong species for use against them.