Shiny, black eggs are laid only in the northern United States. This method of reproduction results in the potential for very rapid population increases. The green peach aphid's resistance to many pesticides, coupled with its reproductive potential makes it a formidable pest on greenhouse crops and bedding plants. The wingless nymph resembles the larger adult. The GPA has a broad host range, having been collected from more than 100 species, including a variety of vegetable and ornamental crops.
Damage is caused from aphids sucking the sap leading to plant distortion.
Also, the plants are contaminated with honeydew, excreted via the cornicles, and cast skins. This species also vectors a number of plant viruses including canna, dahlia and tomato viruses. Up to 30 generations per year may take place under ideal conditions. Because green peach aphids overwinter on weed hosts, infestations can occur in the greenhouse any time of year. Green peach aphids readily infest bedding plants and can be introduced into greenhouses whenever bedding plants are brought in from another grower.