What are the temperature conditions for silkworm eggs to hatch into young silkworms?

1. Raising of silkworms:

1. Temperature and humidity adjustment: 1-3 instars are called silkworms, and the environment required by silkworms is high temperature and humidity. The suitable temperature for 1-2 years is 26-27 degrees, and the relative humidity is 90%; Therefore, the 1-2 instar silkworms are fully prevented from dry breeding, that is, the upper cover is padded with plastic film; The 3rd instar is semi-dry incubated, that is, only covered with plastic film, kept at a temperature of 26-27 degrees, and the relative humidity is 85%.

2. Leaves of small silkworms: 1st instar with mulberry from the top bud to count the 3rd leaf, the leaf color is yellow with green, a silkworm seed, with 1 kg of leaves; The 2nd instar uses the 4th leaf from the top bud, the leaf color is green with yellow, and a silkworm leaves are 3 kg; The 5th-6th leaf of the 3rd instar is counted from the top bud, the leaf color is tender green, shiny, and the leaves of a silkworm are 10-12 kg; The first and second instar silkworms will cut the mulberry leaves into small squares that are twice the length of the silkworm body, and the mulberry leaves of the third instar silkworm are roughly cut into triangles to feed, and the amount of mulberry each time should be mastered in the next time to leave a small amount of residual mulberry on the silkworm seat before the mulberry is moderate.

3. Feeding frequency and time: 4 times a day, the time is: 7 a.m., 11 p.m., 4 p.m., 10 p.m.; The silkworm grows and develops rapidly, and each feeding mulberry should be combined with expansion.

4. Pre-sleep treatment: (1) Sand removal before sleep: the body color of the small silkworm turns white, the body is shortened, the body surface is tense and shiny, the first instar silkworm part of the silkworm body adheres to the silkworm manure, and the second and third instar silkworms have the phenomenon of silkworms carrying silkworms, you can add nets to the mulberry for pre-sleep sand removal.

2) Raising green: If there is a part of the silkworm that has slept and a part of it has not slept has been raised, the net should be added to the mulberry again, and the sleepless silkworm should be brought up and moved to another dustpan to continue to be raised until it sleeps.

5. Protection during sleep: The silkworm seat should be dry in the early stage of sleep, and lime powder should be sprinkled on the silkworm seat to maintain a relative humidity of 80%; When there are silkworms, the room should be humid and maintain a relative humidity of 85%; If the humidity is not enough, sprinkle water on the ground to moisturize.

6. Sleep and feed: When more than 95% of the sleeping silkworms have shed their skin, their heads turn from gray-white to brown, the head becomes significantly larger, and the young silkworms crawl in search of food.

Two. How to promote silkworm seeds.

After receiving the silkworm seeds, the silkworm seeds are protected in a suitable environment, so that the embryos develop normally, the specific methods are: in the sterilized silkworm room, the silkworm seeds are spread in the silkworm plaque, the eggs are facing up, the 1st to 4th day requires room temperature 24, dry and wet difference 2-, the 5th to 10th day requires room temperature 27, dry and wet difference. When the embryo develops to the late stage, it is found that there are a small number of silkworm eggs with small blue dots, immediately darken the silkworm seed with a black cloth, after about 40 hours, that is, 4-5 o'clock before dawn on the third day, remove the dark black cloth, wrap the silkworm seed in white paper, the egg is facing up, turn on the light and sensitize, so that the ant silkworm bites through the egg shell and hatches.

When the silkworm eggs hatch, they need the right temperature and humidity, and they also need good air circulation. Among them, the suitable temperature for incubation is about 24-25, and the suitable humidity for incubation is about 50-60%. Under suitable conditions, it takes about 9-11 days for silkworm eggs to hatch larvae, and if they are induced, the incubation time is about 2-9 days.

Spread the silkworm eggs on top of the silkworm plaque. On the 1st to 4th day, the room temperature is controlled at about 24, and the dry and wet difference is controlled. On the 5th to 10th day, the room temperature is controlled at about 27, and the dry and wet difference is controlled.

When the silkworm embryo develops to the late stage, when a few silkworm eggs have small blue dots on them, use a black cloth to cover the silkworm eggs, wait for 40 hours to pass, remove the black cloth, wrap the silkworm seeds in white paper, turn on the light and sensitize, let the ants and silkworms bite the egg shell and hatch out.

If the color of the silkworm egg is purple-black, it means that it is about to hatch. If the eggs are yellow, they may be unfertilized. If the eggs are white, it means that the silkworms in the eggs have hatched.

There is no change in size or shape, but the color becomes darker and darker.

The eggs are pale yellow or yellow when laid, turn red bean color after 1 2 days, and turn gray-green or purple-black after 3 or 4 days. After that, until hatching, the shape and color do not change anymore, which is called a fixed color.

The outer layer of the silkworm egg is a hard egg shell, and the inside is the yolk and serous membrane, and the embryo in the fertilized egg continuously ingests nutrients during the development process, and gradually develops into a mature silkworm. When the silkworm matures, it bites through the egg shell and crawls out of the egg shell. The newly hatched silkworms are nearly black and are called "ant silkworms".

When the shell is empty, it turns white or yellowish, and the size and shape are still the same.

In the picture below, the yellow ones are the silkworm eggs that cannot hatch; The dark ones are the silkworm eggs that are about to hatch; The white one is the egg shell. The black one looks like a small black thread, which is the ant silkworm.

I think it's good to go, it's very clear and easy to understand.

The incubation time depends on external conditions such as temperature. If the temperature is around 30, the silkworm eggs will hatch in about a week, and if the temperature is lower, they will hatch in about 10 days.

Normal silkworm eggs will come out of new life in the spring from March to April. A female moth can lay about 450 500 silkworm eggs weighing about 1 gram. When the eggs are first laid, they are pale yellow or yellow, and after 1 2 days, they turn red beans, and after 3 or 4 days, they turn gray-green or purple, and they do not change again.

The outer layer of the silkworm egg is a hard egg shell, and the inside is the yolk and serous membrane, and the embryo in the fertilized egg continuously ingests nutrients during the development process, and gradually develops into an ant silkworm, which crawls out of the egg shell, and the egg shell becomes white or light yellow after the egg shell is empty.

Can the silkworm eggs be produced twice The silkworm eggs can be used for the second time, right?

Answers. 1.Silkworm eggs can be produced twice in the year, but to ensure that the climate and environment are suitable, but generally only once.

2.When the silkworm bridge lacks eggs in the hatching, the temperature difference should not be too large, and it should not be placed in a position with direct light, which can be hidden in astigmatism, and the incubation environment should not be too dry.

Silkworms generally hatch in the spring, between late March and May, when the temperature is around 20, it will hatch, that is, when the mulberry leaves germinate.

Before the baby silkworm develops, you need to sprinkle it with some water, so as to maintain a certain humidity, but you can't shout too much water to shout, just keep it moist. During the incubation period, ensure that the temperature is suitable, and there are enough mulberry leaves to be rented, and they will hatch in ten days.

The purchased silkworm eggs need to wait until the mulberry leaves grow in the spring before they can hatch, otherwise the silkworms will have no food, and the eggs must be placed in a completely black environment for about 3-4 days before hatching.

Precautions for silkworm rearing:

1. Regulate temperature: silkworms are very sensitive to temperature, pay attention to temperature control during breeding, and it is best to control it between 20-25.

2. Provide light: To provide it with suitable light, it should not be placed in a dark place for a long time, and it should be exposed to astigmatism.

3. Feeding: Generally feeding mulberry leaves, it is necessary to ensure that the mulberry leaves are clean and fresh, and there can be no moisture on them, and they must be cut into small pieces.

4. Clean up the residue: pay attention to the hygiene in the box during feeding, clean up the remaining mulberry leaves in time, and clean up the excrement.