心喰い虫
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Meanings
1
codling moth larva
Specifically the larva of the codling moth (Cydia pomonella), a pest that bores into fruit.
A codling moth larva had gotten inside the apple.
2
fruit-boring moth larva
General term for any moth larva that feeds inside fruit; not limited to codling moth.
Damage from fruit-boring moth larvae is spreading in this orchard.