Threecornered Alfalfa Hopper Damage

scouted Aug. 29, 2023

Soybeans were scouted at the R6 growth stage and girdling along with adventitious roots were observed along lower areas of the soybean stems.
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. In this environment, the feeding from the threecornored alfalfa hoppers caused the adventitious roots. These roots formed because the plant is trying to compensate for loss of vascular function. In this environment, it is recommended to harvest on time in order to avoid lodging. It is also encouraged to scout the field next season for this pest, at planting and at early seedling stages.

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