CATDOLL : CATDOLL: The metamorphosis of silkworm pupa (video of the metamorphosis of silkworm pupa)

1. What is the process of a silkworm pupa turning into a butterfly?

1. The process of the pupa turning into a butterfly: The insect turns into a green or brown hard shell and becomes a pupa. The pupa does not eat and moves, but the body changes dramatically inside the shell. After a few days, the pupa turns into an adult, and the butterfly emerges from the cracked pupa shell. At this time, its wings are folded. The adult dies after completing the task of laying eggs, and the eggs develop and hatch into caterpillars.

2. The larvae are harmful to humans and eat the leaves of crops. However, most adult butterflies or moths can help plants spread pollen and are also beneficial to humans.

3. After pupation, the inside of the butterfly completely liquefies, and the gene controls the bud (adult organ) to reconstruct and grow. After the corresponding position of the pupa completes the transformation into an adult, it will break out of the pupa and emerge under suitable weather conditions. After spreading its wings and drying them in the sun, the butterfly enters the adult stage.

4. Every caterpillar can transform itself into a free and beautiful butterfly. However, before it turns into a butterfly, it will first turn into a pupa that is trapped in its own cocoon. Facing the pain created by itself in the cocoon, any struggle or attempt to change is in vain. The pupa has only one choice, which is to give up all resistance, fully accept the current feeling, and wait calmly. Until that day, it will break out of the cocoon and be reborn!

2. What is the whole process of silkworm pupa turning into silkworm moth?

The first stage: silkworm eggs. The embryo in the fertilized eggs continuously absorbs nutrients during the development process. The silkworm eggs look very much like fine sesame seeds, generally about 1 mm wide and 0.5 mm thick. After reaching a certain temperature, they gradually develop into ant silkworms.

The second stage: ant silkworms, which are hatched silkworm eggs, are extremely small, black or brown, and have many fine hairs. They look a bit like ants, so they are called ant silkworms. Ant silkworms are about 2 mm long and 0.5 mm wide. After crawling out, they will eat tender mulberry leaves 2 to 3 hours later.

The third stage: mature silkworms. At the end of the fifth instar, the silkworms gradually show the characteristics of maturity and spit out silk threads from their mouths. First, the feces they excrete changes from dark green to leaf green.

3. The whole process of a cocoon turning into a butterfly?

The process of the cocoon pupa turning into a butterfly: the insect turns into a green or brown hard shell and becomes a pupa. The pupa does not eat and moves, but the body changes dramatically inside the shell. After a few days, the pupa turns into an adult, and the butterfly emerges from the cracked pupa shell. At this time, its wings are folded. The adult dies after completing the task of laying eggs, and the eggs develop and hatch into caterpillars.

The larvae are harmful to humans and eat the leaves of crops. However, most adult butterflies or moths can help plants spread pollen, which is also beneficial to humans. After pupation, the inside is completely liquefied, and the genes control the bud body (adult organ) to reconstruct and grow. After the corresponding position of the pupa completes the adult transformation, it will break out of the pupa and emerge in suitable weather conditions. After spreading its wings and drying them in the sun, the butterfly enters the adult stage.

Every caterpillar can transform itself into a free and beautiful butterfly. However, before it turns into a butterfly, it will first turn into a pupa trapped in its own cocoon. Facing the pain created by itself in the cocoon, any struggle or attempt to change is futile. The pupa has only one choice, which is to give up all resistance, fully accept the current feeling, and wait calmly. Until that day, it will break out of the cocoon and be reborn!

Additional information:

The pupal stage occurs only in insects that undergo complete metamorphosis, such as butterflies and moths (Lepidoptera), beetles (Coleoptera), flies (Diptera), and bees, wasps, and ants (Hymenoptera). This stage occurs after the larvae and before the adult, and the adult's body shape is formed during this stage, while the larva's body structure disintegrates.

The scales on the wings of butterflies not only make the butterfly gorgeous, but also act as a raincoat for the butterfly. Because the scales on the wings of butterflies contain rich fat, they can protect the butterfly, so the butterfly can fly even when it rains lightly.

After the butterfly larvae bite through the egg shells and hatch, some species will take a short rest and then directly feed on the host plants; some species (such as the red-eyed bamboo butterfly) will first eat the egg shells and then the plants; and some species even need to feed on the old skin shed during each molting, such as the cabbage butterfly and the spotted bean butterfly.

The food objects of butterfly larvae vary from species to species. Most larvae prefer to eat leaves; some species, such as pollen butterflies and orange-spotted collared butterflies, prefer to eat flower buds; and some species eat young pods or young fruits, such as bean pod butterfly eating young bean pods and gardenia butterfly eating young gardenia fruits. In addition, in the Lycaenidae family, there are a few species whose larvae are carnivorous, for example, the scale butterfly likes to eat coffee scale and the bamboo aphid butterfly feeds exclusively on bamboo aphids. Such carnivorous species are rare beneficial insects among butterflies.

Larvae that feed on plant leaves, such as the first instar, often eat the flesh on the back of the leaf, leaving the upper epidermis, forming transparent spots like glass windows. Later, the larvae eat holes in the leaves or eat from the leaf edge inwards. As the insect body grows, the appetite increases. When the insect population density on a plant is high, the entire plant will be eaten clean.

Most butterflies feed on nectar. As for those butterflies that feed on nectar, they not only feed on nectar, but also like to feed on the nectar of certain specific plants. For example, the blue swallowtail butterfly feeds on the nectar of lily plants; the cabbage butterfly feeds on the nectar of cruciferous plants; and the leopard butterfly feeds on the nectar of Asteraceae plants, etc. Some butterflies that do not feed on nectar include the bamboo-eyed butterfly, which feeds on fig juice; the lilac butterfly, which feeds on the nightshade of diseased oak and poplar trees; and some butterflies feed on the flesh of grapes, and butterflies can often be seen feeding in grape fields.

4. What do silkworm pupae turn into and what will they turn into?

The pupa is the transformation of the silkworm, which will become a silk moth. After about 4 days of spinning silk and making a cocoon, the silkworm will turn into a pupa. The body shape of the silkworm pupa is like a spindle, with three body sections: head, thorax, and abdomen. The head is very small, with compound eyes and antennae; the thorax has thoracic legs and wings; the bulging abdomen has 9 body segments. The color is brown. Professional workers can distinguish the sex of the silkworm pupa from the lines and brown dots on the abdomen.

When the silkworm just pupates, its body color is light yellow and the pupa is tender and soft. Gradually, it will turn into yellow, tan or brown, and the pupa skin will also harden.

After about 12 to 15 days, when the pupa starts to soften again and the skin becomes a little wrinkled and earthy brown, it will become a moth. Silkworm pupae can be eaten to supplement nutrition.

5. What is the evolution process of silkworm pupa?

After the silkworm spins silk and makes a cocoon, it will turn into a pupa about 4 days later. When the silkworm first turns into a pupa, its body color is light yellow and soft, but gradually it will turn yellow, tan or brown, and the pupa skin will become hard.

After about 12 to 15 days, when the pupa begins to soften again, the pupa skin becomes a little wrinkled and turns an earthy brown cocoon color, it will turn into a moth.

6. What is the metamorphosis process of silkworm pupa?

The metamorphosis process of silkworm pupa goes through silkworm egg - larva - mature silkworm - silk cocoon - silkworm moth.

1. The silkworms that have just hatched from the eggs are black like ants. We call them "ant silkworms". Their bodies are covered with fine hairs, which will no longer be noticeable after about two days. The ant silkworms will have an appetite about 40 minutes after hatching, and the feeding process should begin at this time.

2. The silkworm feeds on mulberry leaves. After continuously eating mulberry leaves, its body turns white and it begins to shed its skin after a period of time. The shed period lasts about a day, and it does not eat or move, like sleeping.

3. After molting once, it becomes a second-instar larva. Each time it molts, it ages one year. It has to molt four times in total, becoming a fifth-instar larva before it begins to spin silk and make cocoons.

4. It takes a five-year-old larva two days and two nights to form a cocoon, and it sheds its skin for the final time in the cocoon to become a pupa.

5. After about ten days, the female moth emerges from its cocoon and becomes a silkworm moth. After emerging from the cocoon, the female moth emits a scent from its tail to attract the male to mate. After mating, the male dies. The female moth can lay about 500 eggs in one night and then slowly dies.

6. The development process of silkworms goes through four stages: fertilized egg - larva - pupa - adult. There are obvious differences in morphological structure and living habits between larvae and adults. Such a development process is called complete metamorphosis.

7. How long does it take for a silkworm cocoon to turn into a pupa?

Generally, it takes 4 days for a silkworm to cocoon and turn into a pupa. After less than two weeks, the pupa will slowly wrinkle and soften, and the pupa will begin to transform into a silk moth. At the same time, the silkworm mainly feeds on mulberry leaves during its growth. After eating mulberry leaves continuously, its body will turn white, and after a period of time, it will begin to shed its skin. Moreover, the silkworm will not eat or move when it sheds its skin. It will continue to grow after shedding its old skin and replacing it with a new one.

8. How long does it take for a silkworm to turn into a pupa after making a cocoon?

1. It usually takes 4 days for a silkworm to spin a cocoon and turn into a pupa. After less than two weeks, the pupa will slowly wrinkle and soften, and the pupa will begin to transform into a silk moth.

2. During their growth, silkworms mainly feed on mulberry leaves. After continuously eating mulberry leaves, their bodies will turn white, and after a period of time, they will begin to shed their skins. Moreover, silkworms will stop eating and moving when they shed their skins. They will continue to grow after shedding their old skins and putting on new ones.

3. After 4 molts, the silkworm will turn into a pupa. When the silkworm first turns into a pupa, its body color is light yellow, and as time goes by, it will gradually turn yellow, tan or brown, and the pupa skin will become hard.

9. What is the transformation process of silkworm pupae?

The life of a silkworm goes through four growth stages, from silkworm egg to silkworm larvae, then to silkworm pupa, and finally to moth. The total time is about one month, and the morphology of each growth stage is completely different.

Newly born silkworms look like ants, small and black, with black hairs all over their bodies. The hairs will not fall off until two days later. It is enough to feed four silkworms with one mulberry leaf a day. They eat very slowly, but they keep eating. On the fourth day, the silkworms will not eat or move, as if they are dead. At this time, the silkworms enter the dormant molting stage. It takes about a day for the silkworms to molt. The shed skin is a little yellow and dry, and sticks to the box where the silkworms are raised. The molted silkworms are whiter, bigger, and eat a lot more. They need to be fed more mulberry leaves.

Before spinning silk, the silkworms have to sleep and molt four times. Each time, they eat mulberry leaves continuously for 3-5 days, and then sleep and molt for one day. Each time they molt, the silkworm grows one year older. After the fourth molt, the silkworm is a fifth-instar silkworm, 3-4 cm long, white and plump, and a little transparent. At this time, the body structure of the silkworm can be seen very clearly. The body of the silkworm has twelve segments, and there are small black spots on both sides of each segment near the feet. There are eight pairs of legs on the body, namely: three pairs on the chest, four pairs on the abdomen, and one pair on the tail. There are three dark brown spots on the back of the silkworm from the head to the tail, and there is a tail horn like a needle on the tail.

When a silkworm spins silk, it will constantly move its head up and down and left and right. It takes about two days to make a cocoon. The cocoon is white and oval. The silkworm wraps itself in the cocoon. You need to cut the cocoon to observe the changes of the silkworm in the cocoon. In the cocoon, the silkworm will undergo the last molting and become a pupa. The pupa looks like a bean, with a head, chest and abdomen. At the beginning, the pupa is yellow and a little soft. It slowly turns brown, and the pupa skin becomes hard and wrinkled. In about ten days, the pupa turns into a moth. The moth has six legs and a pair of wings, but it cannot fly. The moth can bite the cocoon and break out of it.

The moths that emerge from the cocoon will be connected at the tails of the male and female moths. It takes about several hours for them to separate. After the separation, the male moth dies. The female moth needs six hours to lay eggs before slowly dying. Each female moth can lay 400-500 eggs. The silkworm eggs look like sesame seeds, densely packed and neatly arranged. The initial color is light yellow. After two days, the silkworm eggs turn into red bean color, and after six days, they turn into gray-green. It takes about ten days for the silkworm eggs to hatch into young silkworms.

Silkworms are most likely to hatch at 25℃-30℃. Silkworms are not easy to hatch at 10℃-20℃ or above 30℃.

The best temperature for silkworm breeding is 24-25 degrees Celsius