CATDOLL : CATDOLL: Observation records of silkworms?

1. Observation records of silkworms?

Silkworm breeding diary

April 9, 2018

On the way home from school this afternoon, my mother saw an old man selling silkworms at the gate of our school, so she spent one yuan to buy ten little silkworms. After I finished my homework, I began to observe them. 1. The color of these silkworms is gray, some are yellow, and they are only half the size of a sewing needle. At 8:30 in the evening, I saw that the silkworms had made several holes in the mulberry leaves.

2. Later I discovered that silkworms would twist their bodies and escape when they encountered danger.

3. I found that the feces of silkworms are like black sesame seeds, and the mouths of the young silkworms are black.

April 9, 2018

Today I found that the silkworms have white heads and yellow bodies. Suddenly I found that silkworms can play hide-and-seek with leaves. I also found that in addition to white silkworms, there are also brown silkworms. Some silkworms look like earthworms.

I counted the silkworms today and found two very small ones. Some of the larger ones have small white spots on their mouths.

April 9, 2018

After not seeing them for three days, I discovered that the silkworms had grown at an alarming rate. They were now terrifyingly large compared to a few days ago.

April 9, 2018

Today I found a silkworm starting to spin silk.

April 9, 2018

Brief comment: Careful observation will allow you to gain some knowledge that may not be found in books

2. What are the contents of the silkworm rearing notes?

1. Observation record of eggs

Color:

shape:

size:

2. Hatching of eggs

temperature:

Time (how many days):

3 Observation records of larvae

First instar silkworm

Size:

Color:

Appearance:

Second to fifth instar silkworms

Length:

Food intake:

Color:

Pattern:

Number of valve pairs:

foot:

Action:

Food:

Number of peeling times:

4. Cocooning Observation Record

Silking days

Cocoon color:

Cocoon shape:

Cocoon size:

Quantity:

Days spent growing in the cocoon:

5. Cut open a cocoon and observe the pupa inside

Pupa color:

Shape:

Appearance:

Action:

6 Records of the Cocoon-Moth Transformation

Silkworm moth appearance:

Mating duration:

Number of eggs laid:

Survival days:

Eating conditions:

7 Observation Notes Summary:

3. Composition on the process of the silkworm rearing experiment?

I heard that beautiful and thin silk is made from silk, and I was very curious, so I excitedly bought a few silkworms and brought them home to raise.

My mother said that silkworms eat mulberry leaves, so whenever I have time, I go to the mulberry tree behind the community to pick mulberry leaves for my silkworms. There are some rules for choosing mulberry leaves. You must pick the tender leaves that have just sprouted, so that the silkworms will eat them deliciously.

After picking the mulberry leaves, I spread them all over the silkworms' home, an old shoe box. The silkworms twisted their snow-white bodies on the green "leaf blanket", just like white pearls placed on a green jade plate. But if you look closely, you will find that the silkworms' bodies are not completely white, and there are some small black spots scattered on their bodies. But this does not reduce my love for the silkworms at all, and I still regard these white elves as the apple of my eye.

Under my care, the silkworms are growing up slowly. Now we can no longer call them silkworms, but should call them "silkworm brothers".

Ah, silkworm, no matter how you change, in my heart, you are always the cutest!

4. How to observe silkworms?

Silkworms reproduce by eggs, which hatch into larvae after about 10 days.

The ant silkworm grows rapidly by feeding, and its body color gradually fades to bluish white. When the larvae grow to a certain size, they need to shed their old skin and grow a wider new skin to continue growing.

During the molting process, silkworms need to sleep while the new skin is formed, which is called hibernation. Hibernation is also the boundary of the silkworm age. The silkworm is called the first instar silkworm after feeding, the second instar silkworm after the first hibernation, and so on. The fourth hibernation is called the fifth instar silkworm. The hibernation period of each instar varies in length, from a few hours to a day.