Effect of external environmental factors on the technological and physical-mechanical properties of silkworm

Abstract

In this article, we have studied the extent to which the technological performance of mulberry silkworms on the industrial hybrids “Musaffo Tola 1” and “Musaffo Tola 2” changes during the hot summer days and these hybrids retain their potential even in adverse stress conditions. Import varieties of “Jingsong x Hoayou” and “Hoayou x Jingsong” hybrid combinations were selected as control hybrids. This Chinese hybrid is the most imported hybrid in Uzbekistan. The purpose of our experiments is to assess the resistance of domestic and import varieties of hybrids to high temperatures on the basis of technological indicators. Changes in the biological performance of import varieties of and domestic hybrids under stress conditions, in particular, a decrease in the viability of worms, an increase in the percentage of deaf and black cocoons, and changes in technological properties were studied.

Appearance of biological and productivity indicators of foreign breeds and hybrids of bombyx mori l. propagated in seed enterprises in different conditions

“…1. The methodology of "Agrotechnical rules for the care of white cocoon breeds" of mulberry silkworm is used in conducting experiments [1][2][3][4][5]. Hybrid worms in the experiment are kept in worm houses that meet agrotechnical requirements in an optimal hygrothermal regime.…”

“…For the spring season, hybrid seeds are pooled and egg samples are taken in 4 replicates of 100 each to determine egg viability. The percentage of egg survival is calculated from the number of viable eggs in the samples [1][2][3][4].…”

“…Throughout the history of civilization, mankind has been in constant search for the preparation and rational use of food, clothing and household items for its needs, especially its demand for natural fibers and fabrics has been extremely high [1][2][3][4].…”

“…In this regard, the research of new methods and agrotechnologies is of great practical importance. A number of works are being carried out by foreign and local scientists in this direction [1][2][3][4][5].…”

“…[2,3] created heat-resistant hybrids using polyvoltine and bivoltine breeds, evaluated them for biological and cocoon productivity characteristics under temperature and humidity conditions, and conducted research on the cultivation of quality cocoon raw materials. Research scientists [4] have substantiated the resistance of polyvoltine eggs to changes in external environmental factors during their embryonic development. [5] showed that the global changes in the world's climate have an effect on the areas where worms are raised in Azerbaijan, and scientifically substantiated the fact that they harm the economy of cocoon-growing and cocoon-spinning enterprises.…”