Egg
Shiny black and found on the bark of apple trees on rough bark around buds.
Adult
Yellowish green with darker green longitudinal stripes down the body.
Honey tubes short, pale green and flanged at the tip.
Other pests with which the pest may be confused
Green apple aphid: The other aphid species that occurs commonly on apple which has a green colour. However, the green apple aphid is uniformly green and has black, moderately long honey tubes. It tends to form dense colonies in extension growth in mid-late summer.
Common green capsid: Nymphs of the common green capsid are green in colour and superficially resemble apple grass aphid. They also occur at a similar time. However, capsid nymphs are active and fast moving and occur as individuals rather than in colonies. Capsid nymphs cause distinct damage to foliage and fruit.