Aphids

Common: Spotted Alfalfa aphid, Rosy apple, Blue aphid, Pea aphid, Pea aphid, Cotton/melon aphid

Scientific: Therioaphis maculata, Dysphis plantaginea, Acyrthosiphon kondoi, Acyrthosiphon kondoi, Acyrthosiphon pisum, Aphis gossypi

Identification and Life Cycle: Most aphids are green, red or brown. Their soft, pear-shaped bodies can measure up to nearly 1/2-inch in length. They can be recognized by their small heads and long bodies, as well as a pair of cornicles (secreting tubes) that project from the back of their abdomen. Eggs that had been laid in the winter finally hatch in the spring, delivering numerous wingless female species. These females give birth to other wingless females until a generation of winged females returns to the original plant. In the fall, these winged females produce wingless males and egg-laying females, which mate, and begin the cycle again.

Geographical Distribution: Found throughout North America.

Damage and Treatment: Aphid damage can cause reduction of plant vigor and can sometimes stunt the growth of the plant. Deformation of the buds and flowers can occur, as well as the curling and puckering of leaves. Most importantly, aphids can serve as the transmitters of other plant diseases and disease-producing organisms.

Treatment should be made when insect populations and/or damage levels reach economic thresholds. Refer to local University Extension Pest Management Guidelines for specific state thresholds.