Aphids 2011-06-03

Aphids 2011-06-03

Observation - Aphids 2011-06-03. Description: A plague of aphids on the stems of this plant at the side of a freshwater pool. I think the plant is mugwort. Are aphids generalists or plant specific? Is it possible to identify this species of aphid?

A plague of aphids on the stems of this plant at the side of a freshwater pool. I think the plant is mugwort.

Are aphids generalists or plant specific? Is it possible to identify this species of aphid?