الفهرس 
REVIEW OF LITRATUREOnly 14 pages are availabe for public view
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Abstract
The effect of treating mulberry leaves with different food
additives i.e., Ascorbic acid, Royal jelly, Bee pollen grains, Algae include Spirulina platensis,
Chlorella vulgaris and Scenedesmus sp. on certain biological aspects and silk production of Bombyx
mori L. were studied. from the beginning of the fourth instar until the end of fifth instar, larvae
were fed on mulberry leaves treated with these different types of food additives once a day and the
other daily meals (2-3 meals) with untreated leaves.
The obtained results revealed that addition of the three concentrations of ascorbic acid (1, 2 and
3%) to mulberry leaves gave positive results on both biological aspects and silk production. The
highest weights of the fourth and fifth larval instars, the shortest duration, the heaviest pupal
weight, the maximum number of eggs/female, the heaviest and longest silk gland, the heaviest fresh
cocoon, cocoon shell and longest silk filament were obtained after feeding the larvae on mulberry
leaves supplemented with 1% ascorbic acid as compared with the other concentrations.
Royal jelly treatments also gave the same trend of results on both biological aspects and silk
production. Royal jelly at 1.0% gave the best results followed by 0.5 and 1.5%.
Also the best results were detected on the biological aspects and silk production when larvae were
fed on mulberry leaves treated with 1.0% of bee pollen grains as compared with 0.5 and 1.5%.
Results indicated that an addition of two concentrations of the three tested algae to mulberry
leaves gave variable results depending on
the algae species and its concentration. Supplemented mulberry leaves
with 12.50 mg/10 ml distilled water of both S. platensis and C. vulgaris caused the positive
effects on the biological aspects and silk production. The same trend was obtained at 18.75 mg/10
ml distilled water of Scenedesmus sp.