Origin(Tamanashi-kasuri)

Tamanashi-kasuri is a bivoltine white Japanese variety being preserved by Sericultural Experiment Station of Japan. The newly hatched larva is light brownish black. The body color of larva is pale white or violetlike pale white. The body marking is normal with quail. The cocoon color is white or light bamboo-leaf green. The cocoon shape is peanut. The wrinkle of cocoon surface is normal. The hibernating egg color is grayish purple. The data on the Tamanashi-kasuri for early autumn rearing tested by Sericultural Experiment Station of Japan in the 23rd year of Showa(1948) is as follows:
(1) Percentage of Double Cocooning Silkworms 5%
(2) Cocoon Weight 1.66g
(3) Cocoon Shell Weight 23.8cg
(4) Percentage of Cocoon Shell Weight 14.3%
(5) Size of Cocoon Filament 2.6d

References
1) Eikichi HIRATSUKA(1961) : History of Modern Silkworm Race Breeding, Dainippon Silk Foundation, Silk Science Research Institute, pp236
2) Eikichi HIRATSUKA(1969) : Genealogy of Japanese Silkworm Races for Practical Use, Dainippon Silk Foundation, Silk Science Research Institute, pp335