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What are the various races of Bombyx mor...

What are the various races of Bombyx mori.

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On the basis of the moults they undergo in the larval stage, B. mori is divided into three races.
They are:
1. Tri moulters - 3 moults
2. Tetra moulters - 4 moults
3. Penta moulters - 5 moults
On the basis of voltinism (the number of broods raised per year), three kinds of races are recognised. They are:
1. Univoltines - one brood only
2. Bivoltines -two broods only
Mutlivoltines - more than two broods
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