On murbei leaves contained an aphrodisiac in the form of glucoside and cause rejection of caterpillars eat the leaves of other plants because nothing of aphrodisiac.
Life Cycle
Silkworm Bombyx Mori, including insect metamorphosis during its life experience.Starting from the egg, caterpillar (larva), chrysalis (pupa), and butterfly.
At fisrt, female butterfly will lay eggs. egg size of about 0,4 cm. After the age of 10 - 12 days, the eggs will hatch into small caterpillars that lenggth 3 mm. For 3 days caterpillars eat murbei leaves and then going to bed and change it's caterpillar skin. During the silkworm lifetime had 4 times caterpillar molting and 5 period eating. Eating period is called 'instar'.
Caterpillars will eat the leaves as much preparation for metamorphosis into butteflies. After reaching the fifth instar caterpillar will stop eating and start making a cocoon for 2-3 days. Then caterpillar metamorphose into butterflies for 11 days. Turned into a pupa inside the cocoon after the butterfly and it will come out of cocoon, to perform mariage the female will produce eggs.
silkworm eggs out of colored black or dark brown, big head and his body still covered with feathers. On the second day, growing fat caterpillar body, greenish, and the feathers have fallen out. Later, the caterpillar stops feeding and enters a rest period that ended with a change of skin. After the turn of the of skin, the cartepillar enters the second instar stage onwards into the third instar, fourth, fifth instar, each preceded by a period of rest and change of skin.
At the end of the fifth instar, there is no change of skin but gradually her body looks as if the opaque and the cartepillar stops eating. This worm has begun to issue and make a cocoon silk fiber. Silkworm cocoon are ready to make a caterpillar called aging.
Long period of life from the moment of birth until the time of making cocoon is about one month, but it is actually strongly influenced by climate and local temperatures.
For 1 month, growing of silkworm is very fast than weight of silkworm the day before make cocoon is about 10.000 times a new silkworm's weight born.
eggs of silkworm
the first instar
the third instar
the fourth instar
the fifth instar
Cocoon
Butterfly
