Bonnie Espenshade sez:
I was just reading an article on natural repellents
and it was stated that mint is a natural repellent
for aphids. Chocolate mint has taken over in several
areas surrounding my pond and I'm now wondering if
this is why the aphids seem to no longer be a problem
in my ponds.

Or could be that it's winter right now. Aphids don't tend to be a problem
in winter. But I do use an organic aphid control spray that seems
effective and its quite minty.