The larva of certain wasps of the family Eurytomidae, especially of Harmolita tritici, that infest grains and cause hard swellings near the first joint of the stems.

• 广肩小蜂幼虫，禾节虫广肩小蜂科，尤指广肩小蜂的一些小蜂的幼虫危害谷物并且使茎部第一节附近膨大变硬