The results were stark. All but one of the aphid colonies that were not tended by ants went extinct. Of the surviving aphid colony, only one aphid remained. Without ants to protect them, the aphids were eaten by predators like ladybug larvae and parasitoid wasps. Apparently, ants remove these predators from their herds when they come to milk the aphids for honeydew. The ants win, the aphids win, but the mugwort suffers. A version of this scenario plays out all over the world, where ant invasions often mean aphid invasions, too.
Ants: the protectors of the aphid world, apparently.
This also explains a lot about the challenges I’ve experienced dealing with aphid infestations in the past!
Excited Pixels 