Developmental changes in urea concentrations in the haemolymph of Daizo (T), an original strain of the silkworm, Bombyx mori reared on an artificial diet and on fresh mulberry leaves

Biochemical changes in hemolymph of spinning and non-spinning silkworm larvae, Bombyx mori (L., 1758) (Lepidoptera: Bombycidae), reared on fresh mulberry leaves: possible reasons for non-spinning syndrome

“…In contrast, urea concentrations in non-spinning larvae hemolymph did not decline but rather increased during the same period, supporting the conclusions being drawn about the reduced urease activity in non-spinning larvae. Consistently, it has been previously reported that high urea concentration in hemolymph of the non-spinning larvae is probably a result of the insufficient transport of leaf urease into the silkworm hemolymph (Sumida et al, 1995).…”

Metabonomic Analysis of Silkworm Midgut Reveals Differences between the Physiological Effects of an Artificial and Mulberry Leaf Diet

“…Chinese scientists also conducted many studies on the effects of AD on silkworm growth during the 1980s [7]. An AD that can be easily stored can not only solve the problem of the seasonal availability of ML but also optimize various silkworm traits and silk production performance through changes in their nutritional composition [8][9][10].…”