Soybeans were scouted at the VC growth stage and threecornered alfalfa hoppers were observed in insect traps. Damage consistent with threecornered alfalfa hopper was observed in the previous growing season. These insect traps were placed early this season in an effort to prevent damage that was discovered injury in the previous season.
This injury was confirmed by an NC State Extension Specialist as damage from Threecornered Alfalfa Hoppers. Weakening and breaking of soybean stems as well as lodging are symptoms associated with damage from threecornered alfalfa hoppers. The treatment recommended to control the pest in this environment was the use of a pyrethroid insecticide, along with consistent scouting throughout the season.