rootworm
['ru:tˌwɜ:m]
n.
食虫（指食根的昆虫或侵入植物根部的线虫）;
根虫;
例句:
-
Dr. Gassmann collected rootworm beetles from four Iowa cornfields with plant damage in 2009.
来自WSJ
-
Each year ten percent of the crop is lost to a pest called corn rootworm.
一种叫玉米根虫的害虫每年会让粮食减产10%。