Discussion of Nutritive Effects of Vitamin B-Complex

Vitamin B-complex plays a very effective role in the larval, pupal and cocoon development. From this experiment it was observed that the growth of B.mori was significantly increased at all the concentration

Improved growth of various insects following vitamin supplementation has been observed by several workers.
Srivastava and Pant (1977) proved that among the vitamin B-complex group
thiamin, riboflavin, nicotinic acid pantothenic acid, pyridoxine and choline-chloride
are essential for larval growth in Dacus cucubitae. Saha and Khan (1996,
reported the effect of enrichment of mulberry leaves with vitamins
and minerals and observed that vitamins significantly increased the growth and
economic characters of B. mori L. at lower concentration to the
highest concentration produced detrimental effects on all the parameters

recorded enhanced growth due to
ascorbic acid supplementation. The absence of ascorbic acid in the diet of
first and second instars larvae B. mori resulted in poor growth and
development (Ito and Arai, 1965). They also recorded reduced pupal and
cocoon weight due to deprivation of this vitamin. The role of ascorbic acid in
the growth of silkworm larvae has also been indicated by Gomma et al.
, (1977).

Khan and Faruki (1990)
and Faruki and Khan (1992) investigated the effects of supplementation of
para- amino benzoic acid on B. mori. They observed that the vitamin
slightly increased the larval and pupal growth and cocoon characters at lower
concentrations (1 and 10 ppm) but it produced deleterious effects on adult
growth. Islam and Khan (1993) observed that mulberry leaves enriched
with manganese sulphate produced beneficial effect on the economic. Hamano and
Okand (1989)
noted that larvae of B. mori L. of a hybrid race
grew well with the diet, which contained 20-30% protein and 15-10mg of vitamin
B6. Kabila et al., 1994) also noted that aspartic and glutamic
acids increased the larval growth.