Insect, Pest and Disease Control - Grain Sorghum
Greenbugs are small (1.6 mm long), soft-bodied insects that are oval in shape. Greenbugs usually feed in colonies by sucking sap from leaves. Feeding may cause mottling and discoloration of the plant. Heavily infested leaves turn red or yellow, shrivel and die. Damaging levels of greenbugs can result in the destruction of entire grain sorghum fields.
"SP290-N The Greenbug in Grain Sorghum," The University of Tennessee Agricultural Extension, 08-0236 SP290-N 06/08(Rev), http://trace.tennessee.edu/utk_agexcrop/33