Population Management of Samia cynthia ricini Boisduval (Lepidoptera: Saturniidae) by Eggs Refrigeration and Its Effect on Hatchability, Development, and Fecundity

Egg viability, hatchability, and development are significant factors in the natural silk industry. Life cycle modification is an important aspect that must be considered to perform effective efficient mass-rearing quality control. This study aimed improve mass rearing efficiency of Samia chintya ricini through a life technique by refrigeration. The was conducted storing S. c. eggs refrigerator at temperature 5°C for one seven days. Observations were made on time, cocoon shell weight, adult female fecundity. results showed egg refrigeration period affected hatchability eggs. A more extended significantly decreased hatchability. could develop into insects after being stored five Meanwhile, none hatched successfully going cold storage six Furthermore, time egg, larvae, pupae, adult. slower larval time. But faster did not affect weight. However, it affecting Total fecundity as increased with different daily oviposition patterns. implies when population excessive, can delayed 1-5 method implied simple eri silkworm cultivation.