Vol. 10, Issue 3, Part A (2024)

Abstract
This article is devoted to the analysis of selection and research works of Uzbek breeders aimed at reducing the larval period of silkworms.The experiments involved 6 domestic species of Uzbekistan breeds, 4 selection systems and industrial hybrids F1in 4 different combinations.As a result of selection work on experimental material over the years, a reduction in the larval period by 2.4-3.1 absolute days was achieved.Although shortening the larval period is somewhat difficult in breeds that mount large cocoons, it has been proven that the larval period can be significantly shortened in breeds with small and medium cocoons.At the same time, experiments have established that industrial hybrids, imported from abroad, have a stable 23-day larval period. From these data, we can draw conclusions about the possibility of reducing the larval period based on selection and providing the industry with new highly productive breeds and hybrids that grow and develop at a rapid pace.