This textbook was published in 1965 by K.M.Rozhdestvensky, Z.T.Toirov, A.A.Sheveleva, which can meet the requirements of the modern educational program of modern higher and secondary special educational institutions, brought by scientists in foreign countries and in the field of silk production of our republic enriched with ongoing scientific research and internet data collected so far. This textbook is the first edition in the Latin-English alphabet. Faculty of zooengineering, senior teacher of the department of silk and mulberry production, Doctor of Philosophy in Agriculture (PhD) Mirzaeva Yorkinoy Yarkulovna. It was translated from Uzbek to English by Umida Khaknazarova, a master's student of Sericulture at Tashkent State Agrarian University.