corn borer
noun
: any of several insects that bore in the stalks or ears of corn: such as
a
: an Old World moth (Ostrinia nubilalis) widespread in eastern and central North America where its larva is a major pest in the stems, crowns, and fruits of crop plants and especially corn
called also European corn borer
b
: a pyralid moth (Diatraea grandiosella) whose larva causes serious damage especially to corn crops by boring in the stalks
called also southwestern corn borer
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Merriam-Webster unabridged
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