Those are aphids.
The ants bring them.
They are a small deal.
Squish all that you can see with your green thumb.
Hardly ever have to poison them.

Put tanglefoot around the base of the stem outdoors.
That stops the ants from bringing more.
And dryer sheets on the soil surface indoors.
That stops the flying aphids.

Enjoy.

Aloha,
Weezard