我国的柞蚕区,大致以北纬34—35°线为界,此线以北为二化性区,以南为一化性区。一化性区每年多数只放养一次(春蚕),很少地区放养两次(加养秋蚕)。如在一化性区发展秋蚕,不但潜力大,效果好,而且在提高复养指数,充分利用农村劳动力,增加收益,为国家提供更多的蚕丝出口等方面均有裨益。 Tussah area of ​​our country, roughly north latitude 34-35 ° line for the community, north of this line is the second of the area, south of a chemical district. One of the nature of the area only once a year stocking (spring silkworm), very few areas stocking twice (plus raise autumn silkworm). For example, the development of autumn silkworms in a localized area is not only of great potential but also of great effect, and it is of great benefit in raising the recuperation index, making full use of the rural labor force, increasing revenue and providing more silk exports to the country.