corn borer

the larva of a European moth (Ostrinia nubilalis), now a destructive pest in the U.S., feeding on corn and other plants

See corn borer in American Heritage Dictionary 4

noun
  1. The larva of a European moth (Pyrausta nubilalis), now common in many areas of eastern North America, that feeds on and destroys corn and other plants, including potatoes and beans. Also called European corn borer.
  2. Any of various insect larvae similar to the corn borer that infest corn.

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