scot29 wrote:After spraying the aphids off, do they come right back?
not real soon, in my experience. I have a honeysuckle trumpet vine that gets covered in aphids every spring. I go over it with kleenex, squishing them (maybe different than spraying?) and that's it for the year. There may be a few aphids after that, but it does not get covered with them again.
"Aphids are difficult to deal with, they have 7 generations of pregnant generations inside. " Citation for that?
Aphids are pretty remarkable creatures, well adapted for fast reproduction. During the season they mostly reproduce parthenogenetically -- females producing more females without the intervention of any males, a kind of natural cloning. According to wiki:
Some aphids have telescoping generations. That is, the parthenogenetic, viviparous [giving birth to live young] female has a daughter within her, who is already parthenogenetically producing her own daughter. Thus a female's diet can affect the body size and birth rate of more than two generations (daughters and granddaughters). https://en.wikipedia.org/wiki/Aphid
So I'll give you the daughters and granddaughters. I'm thinking any more than that may be an exaggeration.