willow-carrot aphid, Cavariella aegopodii

A yellowish-green, elongate aphid, 1 - 2.5 mm long, found on umbelliferous herbs e.g. parsley, coriander and chervil. The head is flat, the siphunculi ('exhaust pipes') are slightly swollen and there is a double cauda ('tail')

Hawthorn-parsley aphid, Dysaphis apiifolia

A yellowish-green, pinkish-green or greyish-green aphid, with a slight powdery wax coating. The head is flat and the siphunculi ('exhaust pipes') are black, surrounded by rusty-orange patches. They can form colonies at the base of parsley stems

Mint aphid, Ovatus crataegarius

A green aphid, mottled with darker green, found on mint stems and leaves. The head has two prominent bumps between the bases of the antennae. The siphunculi ('exhaust pipes') are tapered and green without black tips.

Melon or cotton aphid, Aphis gossypii

A small aphid varying in colour from yellowish green to dark mottled green or black, sometimes with patched of powdery wax. The head is flat and the siphunculi ('exhaust pipes') are short and black. It can form dense colonies on growing points and stems and has been found on coriander, basil, parsley and lemon verbena.

Glasshouse-potato aphid, Aulacorthum solani

A shiny green aphid with darker green patches around the base of the siphunculi ('exhaust pipes'). The siphunculi are green with black tips. An occasional pest of herbs including sage.

Peach-potato aphid,

Myzus persicae

A green, pink or red aphid with dusky tips to the Siphunculi ('exhaust pipes'). A common pest of basil, causing distorted leaves (far right).