Meliarhizophagous fraxinifolii (leafcurl ash aphid) Green ash
Monellia caryae (American walnut aphid) Walnut
Myzocallis tiliae (linden aphid) Linden
Myzocallis alhambra (western dusky-winged oak aphid) Bur oak
Myzocallis ulmifolii (elm leaf aphid) Elm
Myzus ceraki (black cherry aphid) Tart Cherry
Myzus persicae (green peach aphid) Peach, apricot, other Prunus
Nasonovia aquilegiae (columbine aphid) Columbine
Nearctaphis bakeri (shortbeaked clover aphid) Hawthorn
Periphyllus lyropictus (Norway crawler data maple aphid) Norway maple
Prociphilus fagi (woolly beech aphid) Beech
Pterocomma bicolor Populus
Pterocomma smithiae (black willow aphid) Willow
Rhopalosiphum cerasifoliae (chokecherry aphid) Chokecherry, pin cherry
Rhopalosiphum nymphaeae (water lily aphid) Prunus, various aquatic plants
Thecabius lysimachiae (moneywort aphid) Black poplar wood, moneywort (Lysimachia)
Tuberolachnus salignus (Giant willow aphid) Willow
Uroleucon sp. Many flowers
Life History and Habits
Aphids are small insects that can be found on leaves, stems, and sometimes branches of plants. They have an oval body and a pair of tube-like structures (cornicles) can usually be seen protruding from the back of the body. Colors are highly variable among different aphid species, ranging from very pale yellow to dark, almost black. Most have shades of green or orange and some species are even bright red. Upon close inspection, many aphids can be seen to have an intricate body pattern. All aphids are small, ranging from 1.5 to 5.0 mm, with the largest species found on stems and branches.