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Silkworm rearing is being practiced for commercial purpose in different parts of Pakistan by rural
masses as a cottage industry. Silk seed improvement through importation is one of the key initiative towards
popularising and ameliorating silk production in Pakistan. The performance of Bulgarian race of silkworm
reared on local mulberry supplemented with vitamins(Band C) in addition to amino acids (Alanine and
Glycine) was evaluated at24 - 28 ○C and 70± 5 % RH during early larval instars (1
stand 2nd)and 24-28○C and
85 ± 5 % RH during last three (3
rd
-5
th) larval instars. Early in stars were fed on chopped mulberry leaves
whereas later instars were reared on mulberry leaves dipped with 10% solutions of vitamins (B and C) and
2%amino acid (Alanine and Glycine) in different combinations. Data collected at the end of 3rd
,4
th and 5
th
instars showed significant variations in larval body length (2.81, 4.27 and 6.02 cm),body weight (0.35, 1.03
and2.74 g) and food consumption (2.60, 3.26 and 4.12 g) when larvae were fed on mulberry leaves dipped in
10 % Vitamin C Solution + 2 % Glycine + Alanine (T9).Significant differences were also observed in all
growth parameters. Fecundity (439.67 #), Fertility (86.0%) and Hatchability (84.67%) were highest in
T9which were significantly different from control (T0), 422.67, 79.33 and 76.33, respectively. Cocoon Weight
(1.36 g), Shell Weight (0.33 g) and Cocoon shell percentage (24.02%) in T9were significantly different from
control, 1.26 g, 0.25 g and 19.89%, respectively. Bulgarian race has potential to thrive under prevailing
environmental conditions if reared on mulberry leaves rich in vitamins (B and C) in addition to amino acids
(Alanine and Glycine) contents or supplemented.
MAIMOONA KANWAL, MUBASHAR HUSSAIN, ZAHEER ABBAS, SHAKIL AHMAD KHAN, FATIMA ZAFAR , RIZWANKHURSHEED. (2018) Yield performance of Bulgarian race of Silkworm fed on local Mulberry supplemented with Vitamins and Amino Acids, Biologia – Journal of Biological Society of Pakistan, Volume 64 (I), Volume 64 (I).
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