also: しゅんさん
noun
spring breed of silkworm
Refers to silkworms raised in spring, as opposed to summer or autumn breeds. Used in sericulture contexts.
春蚕の繭は夏蚕より大きい。
The cocoons of spring silkworms are larger than those of summer silkworms.
農家は春蚕の飼育を始めた。
The farmers started raising spring silkworms.
Compound of 春 (spring) and 蚕 (silkworm). The reading はるご is the native Japanese reading, while しゅんさん is the Sino-Japanese reading.