robynanne said:I can tell you that ants bring aphids into my garden. They seem to think my plants are little aphid nurseries. I've heard from some people (though not personally witnessed) that they will uproot and "spit out" plants they don't like from the garden. They also carry plant diseases around.
Horntoad said:
I don't think the ants bring aphids, but aphids secrets honeydew which attracts the ants.