0
A silkworm will stop spinning ts cocoon once it has wrapped itself completely in the cocoon.
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
When does a silkworm stop spinning its cocoon?
It takes 25 to 28 days to fully spin its cocoon
How you get silk from butterfly?
Silkworms, which emerge from their cocoons as moths, spin cocoons that are the raw material for the fibre humans use as silk. Cocoons are harvested from domesticated silkworms by heating the cocoon to kill the animal, then the silk cocoon is unraveled. Once the moth has emerged -- in wild silkworms for example, the cocoon's silk can be harvested, but not in one continuous length. As a moth, there is no connection with the now-discarded cocoon.
What happens to silkworms cocoon at a silk factory?
It's boiled and then unwound into a long thread.
What is the source of silk threads?
Silkworms, a type of caterpillar, are the source of silk threads. Silkworms make a cocoon about an inch long in an oval shape. Silkworms only eat the leaves of white mulberry trees.
Why silkworms are not killed?
Silkworms are killed when the cocoon is dropped into boiling water. Once dead, the silk is carefully unwound from the cocoon. As a single silk yarn, it is very weak. By combining several single yarns together a stronger usable yarn is formed.
What is a butterfly metamorphosis?
It's a caterpillar spinning into a cocoon
What is the difference between the pink silkworm cocoon or the white cocoon?
Genetics is the difference between the pink silkworm cocoon or the white cocoon. Silkworms in the wild spun yellow silk to blend into the dead foliage. Today silkworm farmers are beginning to selectively breed for different colors.
Are Silkworms helpful or harmful?
Silkworms are the 2nd most useful insect known to mankind, as it produces silk, did you know that one cocoon is made of a single thread more or less 914 meters long.
Is it right to kill the silkworms when its in the cocoon?
Your question calls for a moral judgment. Most people do not consider it wrong to take the life of an insect.
What is the importance of silkworms?
The silkworm is the larva or caterpillar of the domesticated silkmoth, Bombyx mori. At a certain stage, it weaves a cocoon of silk round itself before beginning its change into a moth. The cocoon is dunked in hot water to kill the caterpillar, and the cocoon is carefully unravelled. Several threads are combined to make the silk yarn used in some clothing.
What are the steps in making silk?
first the silkworms are fed on the leaves of the mulberry bush. then each silkworm spins a continuous thread up to 800 metres long to form a cocoon. then the silkworms are boiled in water and silk is obtained from them
Where is silk?
Silk comes from the silk worm's cocoon. The silkworms are fed mulberry leaves and cared for until they go into their cocoon. Then they are put in hot and cold water and the cocoon is unraveled. Then it is packed in small bundles. Then, you finally have your silk! :) it was discovered in china about 4 thousand years ago
