Silkworm Reproduction and Development 5, Silkworm Reproduction and Development

First, the eggs laid by the moth become the larvae of the silkworm, and the larvae have to sleep 4 times in their lives, molt the skin 4 times, (do sleep once, molt the skin once. And keep eating mulberry leaves until they grow to the size of a little thumb, and the silkworm can become a cocoon. After breaking the cocoon, it is a moth.

The reproductive development of silkworms will go through four processes, namely silkworm eggs, larvae, pupae and adults, among which the shape of silkworm eggs is smaller, the width is about 1 mm, the larvae will crawl out of the silkworm eggs, mainly feed on mulberry leaves, after molting four times, the larvae will spin silk into a pupa and wait for about 14 days, the adult will drill out of the pupae.

1. Silkworm eggs

Silkworms mainly reproduce with eggs, the shape of the silkworm eggs is small, the width is about 1 mm, the thickness is about millimeters, it looks like fine sesame seeds, and the silkworm eggs are light yellow when they are just laid, after 1-2 days, they will become red, and after waiting for 3-4 days, the silkworm eggs will become gray-green or purple, and then the young silkworms will crawl out of the eggs.

2. Larvae

When the young silkworm crawls out of the silkworm egg, the body is black or brown, the shape is similar to that of ants, and the young silkworm mainly feeds on mulberry leaves, it mainly needs to molt four times from the young silkworm to the silkworm cocoon, and the growth rate of the young silkworm after four times of molting is accelerated, the body length can reach 6-7 cm, and its appetite will be reduced.

3. Pupa

Young silkworms will first spit out the silk, so that the silk is bonded to the cocoon, and then spin the silk to connect the surrounding branches, so as to form a cocoon support, and the silkworm cocoon will become a pupa about 4 days, the shape of the silkworm pupae is similar to a spindle, divided into three parts: head, chest and abdomen, wait for about 14 days, the silkworm pupae will become soft.

4. Adults

The adult silkworm is also known as the silkworm moth, its shape is similar to that of a butterfly, and there are white scales on the body, but the wings of the silkworm moth are smaller, and there is no ability to fly, its head is round, with compound eyes and antennae, and the female moth can lay about 500 eggs in one night, and after laying eggs, the female moth will die.

The growth process of silkworms is divided into 4 parts:

1. Silkworm eggs2. The larvae are ulnar.

3. Silkworm pupae (silkworm cocoon).

4. Adult insects.

Silkworms will be bred in many areas, because breeding this kind of thing is more helpful for farmers to increase their income, but most people are not particularly familiar with this small animal, in fact, silkworm raising is also through several different stages, so what are the stages of silkworm development?

First, the stage of silkworm development.

In its life, this small animal generally needs to go through 4 different stages, then these 4 stages are eggs, that is, the eggs of silkworms, and larvae, and then they will become silkworm pupa, and finally adults, which is what we call silkworm moths.

2. Larval to pupal growth.

The life of a silkworm is about 50 days, which can be said to be relatively short, but in these only 50 days, the silkworm will change a lot every day. Among them, the growth process from larva to pupae can be said to account for the main body and the most changes, silkworms from larva to mature pupa need to go through continuous sleep peeling, first when the eggs hatch larvae, need to eat three days of leaves, and then stop eating will sleep, and when you wake up again, it will shed its skin and become a second-instar silkworm, then according to this method, the second-instar silkworm will shed its skin and sleep again after eating the leaves for a few days, and then become a third-instar silkworm, and the third-instar silkworm also needs to take in a lot of food, and eventually become a fourth-instar silkworm, Until the fifth-instar silkworm matures, its body will show a translucent state, and at this time, it will spin silk and become a silkworm chrysalis.

Silkworm is a particularly magical little animal, I believe that many people will feel very surprised after seeing this small animal, and these stages of its development, are roughly divided into the above, if you want to raise silkworms at home, then you can observe these different stages.