Silkworm Variety-- Yuefeng No.3

Approval No.: Yueshen silkworm 2006002

Breeding Unit: Sericulture Technology Extension Center of Guangdong Province, Department of Silk Science, College of Animal Science, South China Agricultural University

Source of variety: V/Xuan//28/32

Characteristics: A binary tetrad hybrid with polygamous lineages. It has the characteristics of strong constitution, high temperature and humidity resistance, fluorine resistance and air pollution resistance, good breeding, high yield, excellent cocoon silk quality and high silkworm egg reproduction coefficient. The hatching is uniform, the orthogonal ant silkworm is quiet, and the anti-cross ant silkworm has strong dissipation. Compared with Liangguang No. 2, the development of each instar is similar. The big silkworm is thicker and white. It eats mulberry vigorously and eats more mulberry in the peak feeding period. The mature silkworm has a certain backlight density, such as uneven light and dark in the cluster room and too dense in the upper cluster. It is easy to form double cocoons. The cocoon shape is long and oval, the size is even, the cocoon color is white and the wrinkle is medium.

Yield performance: From 2004 to 2006, in Luoding, Maoming, Suixi and other places, the cocoon yield of Zhang seed was 43.4 kg, which was 13.61% higher than that of the control variety Liangguang 2. The cocoon yield per 10,000 silkworms, cocoon shell weight per 10,000 silkworms and silk yield per 10,000 silkworms increased by 10.72%, 14.28% and 20.40% respectively.

The main points of rearing technology are as follows: (1) The young silkworm has strong phototaxis and dissipation, grows and develops quickly, pays attention to uniform seating and expansion, adopts full or semi-dry prevention breeding, avoids poor development of silkworm due to hunger;(2) The big silkworm eats mulberry quickly and fiercely, eats more mulberry, especially in the peak feeding period of the fifth instar.

The provincial quality examination committee approved the opinion: Yuefeng No. 3 is a four-way hybrid first generation variety. Silkworms hatch, dormancy and cluster together, strong silkworm body, high yield, excellent cocoon silk quality, easy breeding, stable dormancy and diapause performance, excellent comprehensive economic characteristics. Adapted to the province's various silkworm areas throughout the year feeding. It conforms to the crop variety examination and approval standard of Guangdong Province and passes the examination and approval.