9.
Silk worms take
(11 7 days to spin a cocoon
(3) 10 days to spin a cocoon
(2) 15 days to spin a cocoon
(4) One day to spin a cocoon
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Under ideal conditions (78° to 88° F and allowed to feed nearly continuously) silkworms can go from egg to 1 inch in length in about 12 days, and 3 inches in under 30 days. The worms will begin to spin cocoons at about 28 - 30 days old or when they are between 2 1/2 and 3 inches long.
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