Silkworm is a leaf-eating worm. Therefore, if people have not discovered the wonderful use of this animal, the silkworm may have been destroyed mercilessly!
Do you know how the silkworms build their cocoon . Let look at their process that makes you can't take off your eyes!
Just before its first molt, the head of the worm will turn a bit darker than the rest of its body.
The name for the silkworm is bombyx mori, which means "silkworm of the black mulberry tree".
Silkworm on the mulberry leafs
The silkworm spins itself in a silk cocoon, made of one single thread that may be nearly a mile long, about the size of a cotton ball
Silkworm go through four stages of development, as do most insects: egg, larva, pupa and adult. The adult (imago) stage is the silkworm moth. The larva is the silkworm caterpillar. Since the silkworm grows so much, it must shed its skin four times while it is growing. These stages-within-a-stage are called instars. The Latin (scientific) name for the silkworm is bombyx mori, which means "silkworm of the black mulberry tree".
Following the worm's fourth molt, the silkworm will appear slightly yellow, and its skin will appear tighter than it did in other stages. The silkworm spins itself in a silk cocoon, made of one single thread that may be nearly a mile long, about the size of a cotton ball. Within the cocoon, if the process is allowed to complete itself, the worm is changing into a moth and will emerge as an adult one to two weeks after entering the cocoon.
In addition , Here is the way caterpillar build a cocoon.
Getting Ready to Build a Cocoon
When a caterpillar is ready to transform into a pupa, it finds an isolated place where it can begin its next phase of life. Some caterpillars hang from secluded tree branches, while others actually bury themselves in the ground. The necessity of a cocoon is to provide a protective covering for the caterpillar, as it transforms into a pupa and ultimately a butterfly or moth. A cocoon quickly becomes prime prey for predators.
Cocoons come in a wide variety of colors
Cocoons are constructed from silk. The silk is emitted through two glands and comes out as a thick glue-like material. Barring against popular belief, most caterpillars do not build grand cocoons that are inches in diameter, as often depicted in pictures. Most build a cocoon that is just big enough to encase the body while they are attached to a branch or underside of a leaf. The Skipper butterfly, however, does build the large cocoon that we often envision.
Cocoons come in a wide variety of colors, as well as the ability to be translucent, opaque, soft or hard. It all depends on the species of butterfly or moth building the cocoon. The butterfly or moth that emerges from the cocoon will get out simply by cutting its way out, or secreting a liquid that softens the cocoon enough to break through the walls.
The reference source: Sciencing
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Email email@example.com, and you could even earn money for your stories or tips.