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GROWTH AND DEVELOPMENT OF SILK WORM (BOMBYX MORI L.) ON MULBERRY LEAVES

Abstract

The studies on Growth and development of Bombyx mori L. on Mulberry leaves viz., V-1, S-1635 and M- 5, for head capsule width, body length, body width and body weight, larval weight, Single cocoon weight, shell percentage, Yield and Cocoon filament length was undertaken during 2009-2010. The larval growth of silkworm was completely by passing through five instars each, when fed on leaves of mulberry varieties viz., V-1, S-1635 and M-5, the larval duration silkworm varied from 25.02- 25.26 days on V-1, S-1635, while it ranges from 27.04 days for M-5 mulberry variety. The larval head capsule width of silkworm was found superior to 0.61 mm on S-1635 followed by V-1 having 0.62 mm. V-1 mulberry variety fed then body length x breadth of observed was 5.65 x 1.93 to 39.0 x 9.6 mm. The body weight of silkworm B.mori L. was found to be 43.45 to 873.7 mg for I to V instars when fed on V-1 Mulberry variety. Progression factors of head capsule width, body length, body width and body weight of silkworm on, V-1 was observed to be 1.54 to 2.23 respectively. Variety V-1 was observed significantly superior among tested varieties in larval weight (50.17), Single cocoon weight (0.39 g), shell percentage (19.93 %), Yield (18.70 kg) and Cocoon filament length (810.00 m).

P.A. BOTHIKAR, S.S. JADHAV AND Y.A. SHINDE

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