Kyoso - Kyoso

...For a fly of the Tachinidae family, the setae are weakly developed. They are well known as pests of silkworms and are called maggots. In their larval stage, they grow by parasitizing the larvae of lepidopteran insects such as silkworms, silkworm moths, and silkworms. When they mature, the larvae break out of the host's body and become pupae in the soil.

*Some of the terminology explanations that mention "Kyouso" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…ヤドリバエ科のハエとしては剛毛の発達が弱い。カイコの害虫として著名で，キョウソ(蠁蛆)と呼ばれ，幼虫時代はカイコやヤママユ，シンジュサンなどの鱗翅目昆虫の幼虫に内部寄生して成長する。成熟した幼虫は寄主の体を食い破って脱出し，土中でさなぎとなる。…

※「キョウソ」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報