Do I have lupin aphids?

So I planted this lupin about a week ago and it seems to have already been attacked. I presume these are aphids? They're mainly on the flower but some have also found a home in the leaves. Should I just cut the whole plant back to soil level? I bought it in flower so not sure it would grow back this summer? Are they a risk to other surrounding plants? 




0
Posts
They can be a nuisance - especially with the soft new growth. Getting on top of them just now will help though.
That's what you would do anyway. It will grow more. They thrive on being deadheaded