Abstract:
Adaptation of silkworm to various unfavorable conditions is of great practical importance in the
conditions of Uzbekistan. Because in Uzbekistan, in spring and summer seasons, various stress
factors affect silkworm rearing. This article presents the results of the study on the response of 4
breeds and 2 new systems of mulberry silkworm to poor nutritional stress according to their
reproductive traits.
According to the results of the experiment, the susceptibility of strains and systems of silkworm
to poor feeding was clearly demonstrated in the physiological defect index in egg laying. On the
three-year average indicators, in the comparative variant the proportion of physiologically
defective eggs in the laying was 0.6-1.5%, while in the experimental variant made in the
condition of poor nutrition, this figure was slightly higher at 1.1-1.7%. On this trait in breeding
progeny of Ipakchi 1 and Ipakchi 2 breeds the physiological defect rate didn’t exceed from 0.6-
0.9 % in unfovarble conditions. It means that these two breeds are more adaptable to unfovarble
conditions |
