The fifth instar larvae of multivoltine crossbreed race (PM x CSR2) of silkworm, Bombyx mori (L) were exposed to the magnetic energy of various strengths (1000, 2000, 3000 and 4000 Gauss magnetic field). The magnetization of fifth instar larvae was carried out on the first four days, for half an hour for each day before first feeding. Bioassay of total proteins was carried out on the fifth day of fifth instars. The attempt reveals influence of magnetization of Bombyx mori larvae on the total protein content level in the silk glands, fat bodies and haemolymph. The total protein content was increased with increase in the strength of magnetic field from 1000 to 4000 Gauss magnetic field. The larvae magnetized with 4000 Gauss magnetic field were found with sustained or decreased in total protein contents. Silk gland total proteins were increased from 5.901 to 17.481 percent. Total proteins of fat bodies were increased from 18 to 46.517 percent. And the total proteins of haemolymph were increased from 16.606 to 33.588 percent. Magnetization may have had influence on the increase in the levels of amino acids followed by accelerated rate of protein synthesis in the fifth instar larvae of silkworm, Bombyx mori (L) (Race: PM x CSR2). Magnetic energy should be utilized as efficiently as possible for the progression of growth of larval instars of silkworm, Bombyx mori (L).
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