Why are the silkworms yellow, don t eat mulberry leaves, don t like to move, and sometimes spin silk

When the silkworm baby grows to a certain period, it will turn yellow and become a moth, and then make a cocoon. The growth of the silkworm baby is at that stage 1Eggs: The newly laid eggs are light yellow, flattened and oval, about 1 thick, about 1 in diameter, the color of the eggs will gradually darken, and the unfertilized eggs will not change color;

2.Ant silkworm (first-instar silkworm): the silkworm egg has just hatched out of the body hairy, black, called ant silkworm or hairy silkworm, about 3mm, after the second day, the body color gradually turns white after about four days of molting into the second-star silkworm;

3.Second to fifth instar silkworm: After the ant silkworm molts, it becomes the second instar silkworm, the body color turns white, and the first instar is increased every time the molt is made, and the larvae enter the fifth instar silkworm after four molts, and the growth of the body increases a little after each molt, especially.

The growth is more pronounced in the fourth and fifth years of age.

4.Silkworm pupa: After the silkworm enters the fifth instar, it begins to spin silk and form a cocoon in about seven days, and the silkworm will molt again in the cocoon within about 2 or 3 days, and then turn into a silkworm pupae, the body becomes shorter, fat, brown, and the silkworm moth can be feathered after about ten days;

5.Silkworm moth: Silkworm moth is an adult of silkworms, the body is composed of a head, thorax, abdomen, a pair of antennae on the head, and a pair of wings on the chest, but because it is not fully developed, it cannot fly.

Silkworms spinning silk will no longer eat mulberry leaves. After the silkworm spins the silk, it will not eat, it will slowly vomit, roll the silk into a cocoon, and form a cocoon into a pupa and then feather into a moth.

Silkworms, lepidoptera, are the larvae of silkworm moths, divided into two main groups; A type of silkworm, that is, mulberry silkworms. It feeds mainly on mulberry leaves. The other type is called mountain silkworms, that is, quercus silkworms, which feed on oak leaves. Silkworms go through 4 stages in their life: eggs, larvae, pupa and moths.

Mulberry leaves, is the dried leaves of mulberry plants, is the daily food of silkworms, also known as mulberry, thorn mulberry, mulberry tree, yellow mulberry leaves, etc., mulberry trees are widely planted in the north and south of our country, and the yield of mulberry leaves is abundant.

The silkworm has four times of immovable peeling, the peel is grown, and the fifth time it looks transparent is that the silkworm is going to spin silk to make silkworms, and the peeling needs to be dry and do not move and do not eat mulberry leaves.

Not eating or moving, this is called "dormancy". Silkworm babies live on mulberry leaves, and after eating mulberry leaves, their bodies turn white, and after a while, they begin to peel. When the skin is peeled, you don't eat or move for about a day, which is called "dormancy".

After a peel, it is a second-instar larvae. Even if it sheds its skin once and increases its age by one year, the larvae have to shed their skin four times to become a fifth-instar larva, and then eat mulberry leaves for 8 days to become a mature silkworm and begin to spin silk and form cocoons.

There is a silk on the mulberry leaves, and they don't eat it.

The fifth-instar silkworm began to appear the next day and did not eat mulberry leaves, and its body became yellow, smaller and more transparent, what disease did it get? How to avoid the appearance of this silkworm?

Hello, shrinkage disease, do a good job of silkworm treasure silkworm tools, mulberry leaf foliar disinfection. Silkworm treasure silkworm disinfection can be used to disinfect silkworms or eliminate essence. Use silkworms to disinfect and disinfect 1:

250 dilution, take a bag of this product (including two sachets of 100 grams) add 25 kg of water, stir to dissolve spray or impregnate and disinfect, use 225 ml per square meter, moisturize for 30 minutes; Disinfect with disinfectant should also be diluted at 1:250, take a bag of 100 grams of this stove file and add 25 kg of water, stir and dissolve and spray or impregnate it, 225 ml per square meter, moisturize for 30 minutes. Mulberry leaf disinfection with silkworm disinfection net 1:

1000 dilutions, 100 grams of water per bag, stir and dissolve, spray wet mulberry leaves or impregnate mulberry leaves and dry for 10 minutes to feed silkworms. 2. Choose varieties with strong disease resistance. 3. Improve environmental conditions and strengthen the management of brother breeding.

Because silkworms are molting.

The epidermis does not grow as the body grows during growth and development, and peels off when the body is restricted. Silkworm babies live on mulberry leaves, and after eating mulberry leaves, their bodies become white, and after a period of time, they begin to peel, and when they peel, they do not eat or move when they peel off.

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 dung, 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.

3. 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.

4. 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 has become significantly larger, and the young silkworms crawl in search of food.