noun
codling moth larva
Specifically the larva of the codling moth (Cydia pomonella), a pest that bores into fruit.
リンゴの内部に心喰い虫が入り込んでいた。
A codling moth larva had gotten inside the apple.
noun
fruit-boring moth larva
General term for any moth larva that feeds inside fruit; not limited to codling moth.
この果樹園では心喰い虫の被害が広がっている。
Damage from fruit-boring moth larvae is spreading in this orchard.