Silkworm rearing composition

In the usual study, work and life, everyone must have been exposed to composition. According to the different writing time limit, composition can be divided into limited composition and unlimited composition. So, how to write a composition? The following is my composition about sericulture, which is for reference only and I hope it will help you.

Silkworm rearing composition 1 In the science class on Wednesday, Teacher Gu gave each of us several small silkworms. Silkworm is so cute and chubby in white! I am holding a box containing young silkworms, and I don't want to mention how happy I am.

When the little silkworm first came to my house, it was only about 1.6 cm, which was very short. Under my careful care, I eat and drink every day and grow very fast. Its body is divided into three parts: head, chest and abdomen. There are eight links on the body, and there are small black spots on both sides, which are used for breathing. Silkworms have big heads, big mouthparts and two "teeth" in their jaws, which are suitable for chewing mulberry leaves. When silkworms eat mulberry leaves, they will chew out a "small crescent moon" along the edge of mulberry leaves. Seeing silkworms eating leaves, I finally understand what "gnawing" means.

Look! This white silkworm is my "little model". Whenever I take it out to measure its length, it will look up and sway from side to side, as if to say, "Hum, the master likes me and you like you".

Short and thin, a little confused. Every time they were fed, the other two silkworms ate a lot and lingered on the mulberry leaves. It didn't start squeaking until I put the mulberry leaf in its mouth. The most interesting thing is that when it spins, it is estimated that it is hungry in the middle. What should I do? So it poked a big hole in its hard-woven cocoon, poked its head out and spun silk while eating mulberry leaves. It is really cute.

Silkworm rearing is tedious, but it also brings me a lot of fun!

In science class, the teacher asked us to raise silkworms and observe their growth process. The students are very happy!

In the evening, my mother and I came to the Woods to pick mulberry leaves, and soon the basket was full. My mother and I had a hard time carrying a big basket of mulberry leaves home! The next day, I got the silkworm baby from the teacher. Wow, so cute! I took a big piece of mulberry leaves for the silkworm baby to eat, alas! Can you be civilized! You can't pee anywhere. This time, you can enjoy yourself! Then I will be miserable. I have to feed you mulberry leaves and clean your stool. What a bother!

In another science class, the teacher asked us to measure the length of the silkworm baby with a ruler, observe its appearance and record its defecation. At the same time, the teacher taught us how to distinguish male moths from female moths. The female moth is fat and the male moth is embarrassed.

After school, I ran home quickly and finished the task assigned by my teacher. First of all, I took a ruler and began to measure the length of the silkworm baby, only two centimeters. I tested it for a long time. Whoo! They all grew two centimeters for nothing. Next, I want to observe the shape of the silkworm baby, with a black head and a gray body. Hey! Why is there no mouth? So I took a magnifying glass, and the silkworm babies were hiding under the mulberry leaves. What a bunch of cowards! Let's check your stool! I looked everywhere in their nest, but I didn't find a shit. You finally left me a snack! In this way, day after day, the silkworm baby grows up little by little. One morning, I watched the silkworm babies lying on the ground with their heads held high, like soldiers on guard. I'm a little worried about going to school and asking the teacher. After the teacher's explanation, I finally understood that they are peeling, and after peeling, they will become one-year-old silkworm babies! A few hours passed, and the silkworm babies were skinned. What the teacher said is very accurate and has really grown a lot. It should be the first birthday of the silkworm baby!

I was very happy after school one day, but when I got home, my grandmother told me a very bad news: all the silkworm babies died! My tears can't stop. Goodbye, silkworm baby. I wish I could give you one last birthday. I will miss the good times with you!

On May 1 1 Wednesday, the school gave me five silkworm babies. Two weeks later, my silkworm baby has been fattened by me.

After observation, I found that feeding silkworm babies with mulberry leaves should not be wet, and too many mulberry leaves should not be too little. When the baby silkworm is born, you feed it with mulberry leaves, and it won't eat anything else. It only eats mulberry leaves. On the contrary, if you give it lettuce leaves, it will not eat mulberry leaves, but only lettuce leaves. Therefore, what is given to the silkworm baby at birth will last a lifetime, so what is given to the silkworm baby at birth is very important. Moreover, the appetite and speed of silkworm babies are amazing. Five silkworm babies eat a large piece of mulberry leaves, which is several times or even ten times more than their bodies, and it will be solved in a few hours. If you look carefully, you will find that the silkworm baby first bites out a semicircle on the mulberry leaf with its mouth, and then expands the semicircle bit by bit in the outer circle.

Silkworm babies not only have amazing appetite and speed of eating, but also have amazing growth speed. When I went to school on Monday, I was as thin as a thread. When I came back on Friday, it was as thick as hemp rope. Now my silkworm baby has three cocoons. Two of them were cocooned last night, and one started to cocoon early this morning. Silkworm babies usually make a net with their own silk first, and then spin silk in it to form cocoons. Silkworm babies spin silk quickly. They just start to weave nets in the morning and cocoon at night.

In a few days, the young silkworm will break out of its cocoon and complete its lifelong mission, leaving a white cocoon for human use. The silk quilts and silk garments used in our life are all made of cocoons. This is that life is infinite, struggle is infinite, life is limited, and value is infinite; Sacrifice yourself, be happy with others. Silkworms can do this, so can we. I want to learn from silkworms.

On a whim these days, I bought some silkworm babies at the school gate and prepared to take them home. Who knows this? I'm addicted. In the first few days, the silkworm was very small and inconspicuous in the box. When changing mulberry leaves, I have to be careful not to throw away the old mulberry leaves and silkworms together. Under my careful care, the silkworm baby grows very fast, and in a few days, it is "fat". The first thing I do when I go home every day is to observe the growth of silkworm babies.

Silkworms have a characteristic, that is, they shed their skins. When a silkworm molts, it first compresses all its molting on its tail, then stretches its body and tail hard, then contracts suddenly, and finally throws its tail over. This action has to be repeated several times to take off the skin, and the silkworm has to shed its skin four times to turn the cocoon into a pupa. The way silkworms eat mulberry leaves is sometimes interesting. In order to eat mulberry leaves more conveniently, they even adopted the method of "hanging the golden hook upside down", hugging the edge of mulberry leaves with their feet and eating greedily with their mouths open. I saw that the silkworm's mouth was very small, and it didn't eat much mulberry leaves, but it ate quickly. On several occasions, a big hole was missing from a mulberry leaf.

Silkworm has been a good friend of mankind since ancient times. It's not only cute, but also great. "Silkworms will weave until they die in spring, and candles will drain the wick every night." It just wants to pay silently, but it doesn't ask for anything in return.

My beloved teacher, you are like this spring silkworm, silently contributing and nurturing us from generation to generation. I love silkworms, but I love teachers more!

My little cousin gave me a piece of mulberry leaf, on which two silkworm babies were lying lazily. I was so happy that I quickly found a box and put the silkworm baby in it. I think: a piece of mulberry leaves can make them eat for a day. Reality is totally different from imagination. It turns out that they are foodies! It didn't take long for the mulberry leaf to have only the residue they didn't eat. I had to go to the park near my home and find some fresh mulberry leaves to feed them.

How on earth do they eat? A small head can eat so fast. In order to understand this reason, I put the mulberry leaves in and opened the lid. I squatted aside and observed them carefully. I saw them crawling slowly on the mulberry leaves, but their heads were held high from time to time and their mouths were crawling quickly. Soon the mulberry leaves were bitten out of a hole. It seems that their title of eating goods really deserves its reputation.

The next day, there was only residue left in the box, and there were some small black things left, probably their poop. I still picked a few small mulberry leaves like the first day. I want to put the silkworm baby on the fresh mulberry leaves and then dump the residue and black manure, but the silkworm baby just sticks to a residue, so I have to put that residue aside and dump the others. The next task is more difficult, because it is not easy to put them on new leaves without hurting the silkworm baby. I held one gently and pulled it carefully, but they moved. Mom said, "It's not easy. As long as the residue is put on the new leaf, the silkworm will climb over when it wants to eat the new leaf. Why not just take the residue away? " I did so, and the silkworm baby did climb to the new leaf slowly, but the tail was still stuck with residue, and I had a hard time getting it off.

It seems that raising silkworms is not easy.

Sericulture Writing 6 "And silkworms will weave until they die in spring". In order to explore the mystery of silkworms, my family and I decided to raise silkworms once and have a close contact with them.

The first thing I saw was a pile of black round particles, which were silkworm eggs. We put it in an open little box. Soon, the silkworms hatched, small and black, like black pigtails. Except that the head is a little white, the rest are all black. A few days later, the silkworm baby turned white. You can clearly see that the silkworm's mouth is a black spot. There are two small teeth under the black spot, which are used by silkworms to eat mulberry leaves. In a few days, the silkworm will shed its skin. Silkworms don't eat or drink before molting. I thought silkworm was ill. When a silkworm molts, there will be two layers of skin on its tail, and then one layer will automatically fall off and the other layer will not move. After molting, silkworms start eating and drinking again. The molting silkworm is getting whiter and whiter, and the tip of its tail is slowly standing on end.

As the silkworms get bigger and bigger, their food intake is getting bigger and bigger, and the silkworm excrement (stool) is getting bigger and bigger. Silkworms should be three or four years old now. The body turns white and the mouth becomes flat, so you can eat mulberry leaves better. The tip of the tail stands upright. It is said that everything produced by every part of silkworm is precious. Silk from silkworms can be woven into silk quilts, which can give people warmth. Silkworm excrement is a traditional Chinese medicine, which can be boiled, boiled and boiled. Moreover, silkworms were already "treasures" in the hands of the ancients, so many poems describing silkworms were written, among which "Spring silkworms must be woven until they die" is a typical one.

Silkworm, in our mind, is a lovely type, full of treasures. I hope all of us can join hands to protect silkworms and animals.

One day, my father brought me a small paper box from work, which turned out to be a few small silkworms! I was ecstatic and quickly asked my father for ways to raise silkworms. Then, I started my sericulture journey.

First, I found a shoe box and moved them in. Then bend down and observe them carefully. Most of them are white, but one is black and white. I thought I was sick, and my father told me it was a tiger-headed silkworm. Other silkworms can only make white cocoons, but it can make colorful cocoons. My hanging heart was put down and I had some little joy. They all have small eyes and a hidden mouth.

Ah! They must all be hungry. So, I took out the mulberry leaves that my father had already prepared for me, cut them into long strips with scissors and put them in the silkworm's "house". As soon as the mulberry leaves were put in, they smelled the smell and climbed up with their heads held high. Some people grab mulberry leaves with their feet and eat with their heads down. Some people lie on the back of mulberry leaves and eat in front. Then they stick their heads out of the holes and continue to eat. They look lovely.

A few weeks later, the silkworm's food intake suddenly soared, and it had to be fed three times a day. I think these little silkworms are going to cocoon on the mountain. Sure enough, a few days later, there were cocoons in the shoe box, and one of them was golden yellow!

After a while, moths hatched in the cocoon. I opened the window and sent them out. I think I'd better send my silkworm baby back to nature!

Today, I'm going to tell you about the silkworm baby I have now. They are naughty, jumping up and down from time to time, being very picky about food, and sometimes dismissing certain foods. Still, I like them very much.

At first, black silkworm eggs were like small black spots. A week later, they hatched and became ants and silkworms. Their length can only be compared with that of ordinary small ants. A few days later, a tender silkworm baby appeared. As soon as I saw it, I immediately picked the tender mulberry leaves from the mulberry trees, and according to the requirements of the science teacher, I wiped the mulberry leaves clean with a dry rag. I took out a rag and carefully wiped the mulberry leaves. After washing, I put mulberry leaves in front of silkworms for fear of waking them up. After waking up, they climbed onto the mulberry leaves with their soft bodies and began to eat delicious mulberry leaves with relish. When they eat, they eat mulberry leaves when no one is around. They seem hungry because they have slept for a long time. "Look! How cute! " I said to myself.

But something unexpected happened in the sky! Even in front of such a lovely creature, death will not be soft-hearted. What a cruel and vicious god of death, so he robbed the life of the silkworm baby. By the time I found out, it was too late. This discovery is like a bolt from the blue, which makes me extremely sad.

But why did the silkworm baby die? I checked, and the silkworm baby was in good health and showed no signs of injury. At this time, I found that the color of the silkworm baby changed, and its body turned yellow. I turned out to be sick. Alas! How careless of me! Why do silkworms get sick? I finally found the answer: I didn't dry the water on the mulberry leaves. Watching other people's silkworms cocoon, I am ecstatic and in high spirits. How can I not envy them? I hope my other silkworm can cocoon.

Silkworm rearing mainly tests endurance, and if you persist, you will succeed one day. There are many good things to grind, I think: only by raising silkworms seriously will you not find it difficult.

According to the needs of science class this semester, we learn about the life cycle of animals by raising silkworms.

At first, my parents didn't want me to raise silkworms, because we are northerners and have never raised silkworms. I haven't even seen them. This is my first chance.

Because of my insistence, they finally agreed. So, I bought two packages of mulberry leaves online, and there was a small package of silkworm eggs inside. After nearly two weeks, I'll look again, yeah! The little silkworm is out! The newly hatched silkworms are a little dark. If you don't look carefully, it really looks like an ant. No wonder it's called ant silkworm!

Gradually, the young silkworm grew up, turned white and ate more. But the two bags of mulberry leaves bought back have rotted away, and there is not much left. I borrowed some mulberry leaves from my classmates, but it was not enough, so I had to buy another pack from the Internet.

Now young silkworms eat a lot and grow fast. It should be the second instar larva. Because I raised it late, all the silkworm babies in my classmate's house were cocooned. According to the students, once a larva molts, it will increase by one year, and * * * will molt four times, and it will take about 6-8 days to become a fifth instar larva, and then it will start spinning and cocooning.

It takes two days and two nights for the fifth instar larvae to cocoon, and the cocoon silk can be 1. It is five kilometers long. The fifth instar larvae shed their cocoons for the last time (the fifth time) and pupated.

After about 7- 10 days, the pupa will become a silkworm moth and break out of the cocoon. After cocoon emergence, the female moth's tail will emit a smell to lure the male moth to mate. After mating, the female moth lays about 500 eggs in about 4-5 hours, and then slowly dies.

During more than a month of nursing silkworm babies, we can learn about the natural laws of a small life's morphological changes, life changes, birth and death, and feel the strangeness of life. Silkworms are small, but they really need to learn a lot of scientific knowledge about sericulture in the process of rearing!

Silkworm composition 10 The science teacher asked us to raise silkworm babies, and then we distributed silkworm eggs. I was very excited that day. Under my constant urging, my mother picked mulberry leaves for me.

However, three days later, the silkworm baby still didn't appear. Look at the silkworm eggs, lying there motionless. Oh, I'm really anxious! I go to see silkworm eggs several times a day, expecting the early arrival of silkworm babies.

The fourth morning, as soon as I opened the box, I found two silkworms crawling slowly on the paper. I was very happy, so I brushed the silkworm with goose feathers that I had already prepared on the mulberry leaves cut into small pieces and put them in the box. A few small holes have been poked on the lid of the box, so that the silkworm baby can breathe fresh air without having to find a home because of crawling around. On the fifth morning, I found a dozen little silkworms coming out and eating mulberry leaves slowly.

The newborn silkworm is smaller than the ant, black and furry, just like a small caterpillar. Empty silkworm egg shells have become transparent. I was surprised and said,' Silkworm babies can't be so small, can they? "

I have been feeding mulberry leaves to the silkworm baby, and the silkworm baby has grown up gradually. When the baby silkworm is older, I found that the silkworm has three parts, head, chest, abdomen and many feet. I read that their feet grow in different places, called chest feet, abdomen feet and tail feet. Silkworm babies also have hair on their noses. They shake their heads when they eat, and soon a small hole appears on the mulberry leaves.

After a few days, the silkworm baby's head turned white, but its body turned yellow. Today, Wu found that the little silkworm held its head high motionless, stopped crawling around and eating mulberry leaves, which scared me. I ran to ask my mother. My mother told me with a smile: "Silkworm babies shed their skin four times in their lives. Today is the first time they molt. Silkworm babies molt and can't eat. " Every time you molt, you grow up. "

After listening to my mother, a stone in my heart fell to the ground. I am looking forward to the silkworm baby molting quickly and growing into a big silkworm baby!

Sericulture composition 1 1 There was an assignment in science class recently: sericulture. I came home in high spirits, opened the box and counted it: one, two, three ... six, seven, one * * there are seven. Hehe, I counted and remembered the story of the seven dwarfs. Since the seven dwarfs all have their own names, so should these silkworm babies! So I gave this silkworm baby some interesting names. The first is to eat more and eat faster, which is called "greedy ghost"; Second, I sleep every time I watch it, so I'm called "little slacker". The third stripe on the back is called "zebra stripe"; Article 4 is very active, so it is called "naughty"; The fifth reminds me of the lovely Minions, called "Little Yellow Silkworm"; Article 6 whenever I come to see it, I will look up at me with puzzled eyes, which is called "little question mark"; The last one with a black back is called "The Dark Messenger".

Later, I found that every little silkworm has a thorn on its back. I don't know why. After checking the information, I know that the sharp thorn is male and the round thorn is female. I counted two males and five females.

When silkworms eat mulberry leaves, they can't find anything without looking carefully, but looking carefully, I find that silkworms eat mulberry leaves regularly: eat from left to right, repeat nine to twelve times, climb forward twice and continue to eat. What surprises me most is that these silkworms will rest after eating mulberry leaves, and even raise their heads during the rest, ranging from one to two minutes to four or five minutes.

Observing the silkworm, I suddenly feel that the silkworm is still quite mysterious to me, and I can't wait to see it shed its skin.

Today, my mother bought me three silkworms, all black, almost like ants.

Mother put the silkworm in the fish tank. One day, we found that it had changed from "ant" to "handsome boy". The next day, I got up early and picked mulberry leaves for them. I thought silkworms wouldn't eat too much after peeling, but I didn't expect to kill a handful of mulberry leaves at once. The fish tank is full of silkworm excrement, which at first glance is pulled by shelled silkworms. Looking at the shelled silkworm, I saw it crawling around in the fish tank. The small sucker in its abdomen makes it easy to "fly over the eaves" in the fish tank. My mother used disposable chopsticks to build scaffolding, but she was ungrateful. I tried to escape from prison several times and was arrested by me. After a night of overeating, a two-year-old silkworm's body is bigger than yesterday. Mother wants to clean their nest, so she gently grips the third-instar silkworm with disposable chopsticks to help it move its position gently. Unexpectedly, it shook its head at its mother viciously, as if to say, "Put me down quickly and don't touch me at your own risk." Mom won't be scared by it! It puts the 30-year-old silkworm on white paper to help the second-year-old silkworm move. The wet behind the ears child, like his brother, tried to scare away his mother. I didn't resist until the fish tank was cleaned. I got up the next morning and found that the state of the four-year-old silkworm surprised me! The four-year-old silkworm kept rolling in the fish tank, stirring like a razor on its stomach. I was worried, and I didn't feel relieved until it began to chew mulberry leaves again the next day. But a few days later, the four-year-old silkworm died. It turned out that it had never crossed the gate of hell. The normal performance a few days ago was actually a dead light. Today, the merciless death reached out and took away its weak life.

May the fourth instar silkworm live a happy life in heaven.

Silkworm rearing composition 13 The first thing to do after getting up on the morning of May 4th is to see if the silkworm is awake. Suddenly found that the "silkworm king" was gone. The boy actually hid in the corner of the box and pulled some "lines" scattered on his body. What happened? Call your mother quickly, and her mother said, "It's okay, your silkworm king has gone up the mountain!" " ""what's going up the hill? "I am even more puzzled." Where do the mountains here come from? "Later, my mother explained it to me." Going up the mountain means that silkworms begin to spin silk and form cocoons.

"Are you? My silkworm is finally cocooning. Last week, when I saw someone making a silk quilt, I wondered when my silkworm would start to cocoon. How so fast? " I am ecstatic.

I saw the "Silkworm King" curled up in a corner of the box, surrounded by silk. It wraps itself in it, eats nothing, crawls slowly and spins quietly. Other silkworms are eating mulberry leaves with relish, but the "silkworm king" is unmoved. I think it must be weaving its own dreams.

When I came home from school at night, the "Silkworm King" disappeared. Where did it go? I only see a white cocoon in the corner of the box. "Silkworm King" must be hidden in it! It's amazing. Just after a long time, an oval cocoon has been woven. How can there be so much silk in its belly? I checked some information, only to know that mulberry leaves eaten by silkworms are rich in protein, and silkworm digesters can turn mulberry leaves into countless filaments. When it spits out all the silk, the silkworm will become a moth and finally break into a butterfly.

I think my 16 silkworm will soon cocoon and eventually become a moth. I have to find more mulberry leaves to fatten up, or I won't have a chance to take care of them after cocoon formation.

Silkworm rearing composition 14 These silkworm babies began to be reared on May 2nd.

Carefully change mulberry leaves and silkworm eggs every day, twice a day. Then I squatted beside them and watched them crawl around slowly, chewing green mulberry leaves gracefully. Sometimes it lasts for hours at a time, and I can't even help holding them in my hand. It's really interesting to watch its short legs move forward in an orderly way and its fleshy bodies arch each other. It's just that it's been too long and I feel sick, so I quickly put the chubby guy back in the box. Stay a little longer and I'll start to get goose bumps. Take good care of it day after day and never feel tired or bored. Suddenly one day, an unformed silkworm fruit was found in the corner of the box. It is indeed unformed, because through the thin silk, you can still see the fleshy silkworm baby, twisting its heavy body, its small head swinging up and down, and a filament in its mouth. Slowly, silkworms are no longer greedy, but busy looking for the best place to live. So I was busy putting on airs for them, but it always seemed in vain. If you think it's a good place, it just doesn't like it, so you have to find it yourself. Later, I simply left it alone and put a few branches. Get up early every day, go home from work, and after dinner, always take some time to look at those silkworms who are looking around, spinning or surrounded by silkworms. Time always goes by inadvertently, and it surprises me inadvertently. One day, a small gray moth was lying on the silkworm fruit, flapping its wings. Seeing this scene, I can't help but exclaim. Slowly, all the silkworm fruits were chewed up one by one. All the little gray people have found their partners to complete their sacred mission. Later, countless round silkworm eggs smaller than sesame seeds were harvested. It was yellow and white when it was born, and it turned dark gray in a few days. So I chose a free day and carefully cut off the extra paper, leaving only the part with silkworm eggs. ......

Looking at the little silkworm moth that has stopped breathing, a trace of sadness lingers in my heart. Today is June of 12, which lasted for 42 days, a short and happy 42 days, and witnessed the great and magical life journey of Silkworm.

See you next year, silkworm babies.

Silkworm rearing composition 15 "My silkworm is going to cocoon!" I shouted excitedly because I saw a white fat silkworm start spinning a lot.

I gently picked up the silkworm and put it in the "cocoon room" I made for it with cardboard boxes. I saw it twisting its soft body, looking around and starting to spin silk and cocoon.

It vomited a layer of silk from top to bottom, then climbed into the middle of the silk, shook it, spit out a thin silk, repeatedly woven it into an "8" shape, wrapped itself in the middle, and a cocoon was initially formed. Silkworms have no rest. It continues to spin silk and wants to make its house thicker.

I woke up the next morning and found that the cocoon was ready. Like a white peanut. I touched the silk outside the cocoon with my fingers again and found that it was tough and strong.

What would it be like for a little silkworm to sleep in a hut made by itself? Has it pupated?

When I came home from school at noon, I couldn't wait to pick the cocoon and cut it carefully with scissors. Unexpectedly, the silkworm baby has not yet become a pupa, but it is smaller than before cocoon formation.

I put the silkworm back in its original position, hoping that my behavior would not hurt it.

In the next few days, I found that the silkworm's body gradually contracted from the cut gap and became a small, thick "spinning pestle". Not only that, its body color has gradually changed from white to light yellow. On the fifth day, the pupa skin is brown and hard.

A few days later, other silkworms began to cocoon. How I hope my silkworm chrysalis can break into a butterfly as soon as possible, because then I can use its eggs to raise more lovely silkworm babies.