I'm from Ontario, Canada. I have something on our wave petunias, however it can't be dung or seeds since they move around. They are as tiny as an aphid (even smaller), they're black, & my petunias are infested with them. Originally I thought no damage was being done (just looked awful), however, these little tiny bugs have not only moved on to our potato vines, but they're now causing damage on our potato tree . We've sprayed with insecticidal soap, but it hasn't helped any. These bugs are as tiny as (maybe even tinier) fleas / lice. I don't think they're a flea-beetle (they aren't hard & they don't "spring" [jump] away when you touch them). Any help would be appreciated.