noun
silkworm moth; silk moth
Refers specifically to the domesticated silk moth Bombyx mori, the adult form of the silkworm.
See also: 蚕
カイコガは成虫になると何も食べない。
The silk moth does not eat anything once it becomes an adult.
蚕 (かいこ) refers to the silkworm larva, while カイコガ refers to the adult moth.
Compound of 蚕 (かいこ, 'silkworm') and 蛾 (が, 'moth').