It is about 2 mm long. The legs and short cornicles are pale-green with black tips. The antennae are black. It is found in colonies or scattered on lower leaves, stems, and roots of cereals and grasses. They are pear shaped, about 3 mm long and 1.5 mm wide, with long slim legs.
Nymphs are smaller but closely resemble adults.
Adults and nymphs have long slender cornicles. Potato aphid , Macrosiphun euphorbiae The potato aphid is common is common on potatoes and, to a lesser degree, on flax. Adult potato aphids are large, elongated, and soft-bodied. The body is variable in colour - either yellow, green, or pink, with a darker dorsal ridge. They are wedge-shaped.