You can distinguish winged forms of greenbugs from other winged aphid species by the single fork of the median vein of the forewings. The strain of greenbugs attacking sorghums differs from other aphids by their ability to reproduce at relatively high temperatures. Greenbugs give birth to living young. These newly born greenbugs may complete their growth and development within one to three weeks depending on the temperature. There may be 10 to 15 generations per year on sorghums in Missouri.
Winged forms develop under crowded and droughty conditions or upon maturity of the host plant.
Winged forms may be dispersed many miles by flight and prevailing winds. Corn leaf aphids are greenish-blue in color. Antennae and all of the legs and cornicles are black. These aphids usually are found in the whorls and on the tops of newly emerged leaves of sorghum plants. The life cycle of corn leaf aphids is similar to that of greenbugs.