summer silkworms
夏蚕は暑い時期に飼育される蚕だ。
Summer silkworms are silkworms raised during the hot season.
夏蚕の繭から取れる糸は質がよい。
Thread obtained from summer silkworm cocoons is of good quality.
農家が夏蚕の世話に忙しく働いていた。
The farmers were busy tending to the summer silkworms.