The method of separating male silkworm from female silkworm is as follows:
1. Identification method of ant silkworm before molting for the first time: the small black silkworm is the male silkworm, and the lighter and larger silkworm is the female silkworm.
2, the identification method of big silkworms: when they grow up, they all turn white, look at the ass, the tip is male, and the circle is female. When the silkworm is four years old, its body becomes bigger, which makes it easier to distinguish between males and females: from the tail of the silkworm, the male silkworm has a protruding dot between the second and third knots, which is called Harold's gland; Female silkworms have four concave spots under the penultimate and third knots, which are called Duchenne glands.
3. Identification method of old silkworm: There are four transparent points on the ventral side of the eighth and ninth section of female silkworm, and one transparent point in the center of the ventral side of the ninth section of male silkworm.
4. Identification method of pupa: There is a straight line in the center of female pupa abdomen, which separates the 89th section from it, while there is a pair of small protrusions in the center of male pupa abdomen. Below the link at the end of the pupa, the female pupa has an X shape, but the male pupa does not. Moreover, the female pupa is fatter and the male pupa is slightly longer.
5. Moth identification method: there is a black bone plate near the mating hole of the female moth, while the male moth has a pair of claws when breeding outside. Female silkworm moths are fatter and will lay eggs after mating, while male silkworm moths are slightly longer.
How to tell whether a silkworm baby is male or female?
The method of separating male silkworm from female silkworm;
1, look at the end:
There are four concave spots on the ventral surface of the second and third segments of the female silkworm tail, which are called Duchenne glands; Between the second and third section of male silkworm, there is a protruding point called Helotel gland.
2, look at the abdomen:
The yellow one is female and the white one is male.
3. Look at the silkworm chrysalis:
Below the tail end of the pupa, the female pupa has an X shape, but the male pupa does not. The female pupa is fatter and the male pupa is longer.
Conditions that should be paid attention to in sericulture:
1, adjust the temperature
Silkworm is sensitive to temperature, which is beneficial to embryo development in a warm environment. Therefore, it is best to control the temperature between 20-25℃ and not lower than 20℃. If the feeding temperature is too low, the silkworm babies will stop growing.
Step 2 provide light
In the process of raising silkworms, it is necessary to provide suitable light for silkworms, and not to keep them in the shade for a long time, otherwise it will affect their appetite. When the weather is good, you can put them in a semi-shade and let them receive natural light.
Step 3: Feed
Silkworm's stomach is very fragile. When feeding it food, try to choose softer leaves, such as mulberry leaves and cabbage leaves. Pay attention to chop the leaves into small pieces, which is convenient for silkworm babies to eat, so as not to be difficult to swallow.
4, clean up the residue
In the process of raising silkworm babies, we should pay attention to the hygiene in the box, and clean up the leaves and feed in time after they are found, so as not to breed bacteria after decay, which will lead to diarrhea and serious illness of silkworm babies.
Describe the characteristics of silkworms when they spin silk.
Silkworms don't eat mulberry leaves before spinning. It's very quiet. Their bodies began to become bright and transparent, crawling around and spitting a little silk. The stool is dark green, and it is much bigger than usual, and some yellow water will flow. This is drainage. The muscles of the silkworm head stretch back and forth with the swing, which means that the silkworm begins to find a suitable position and start to cocoon.
When you find that the silkworm is about to spin silk, you should prepare a small box, spread paper in the box and pick some fresh mulberry leaves. Put mulberry leaves in a small box, and then put silkworms on it. In this way, after about a week, the silkworm will grow up and peel slowly, and once peeled, it will become yellow skin. About three or four times, when the silkworm is translucent and does not eat, it is time for the silkworm to cocoon.
At first, silkworms will spit some white silk. It's best to put it in another box at this time, and don't put anything, because silkworms won't eat it at this time. When a silkworm spins a cocoon, it wraps itself in the cocoon. Don't touch it at this time, just wait for the cocoon to knot.
Briefly describe the spinning process of silkworm.
Mature silkworms keep crawling after cocoon formation, and when they find a suitable cocoon breeding place, they start spinning and cocoon formation.
Silkworm spinning and cocoon formation can be divided into four processes:
Mature silkworms first spit out their own silk and stick it on a cocoon trap, and then connect the surrounding branches with their own silk, which is to make a cocoon net. The cocoon net has no cocoon shape, but some soft and messy cocoon silk layers as the support for cocoon formation.
After the silkworm completes the cocoon web, it continues to spit out messy silk loops, thickens the inner layer of the cocoon web, and then spins in an S shape, and the outline of the cocoon begins to appear, which is called cocoon clothing. The silk fibers in cocoon shell are thin and brittle, with extremely irregular arrangement and high sericin content.
After the cocoon shell is formed, the cocoon cavity gradually becomes smaller, the front and rear ends of the silkworm body bend backward to form a C shape, and the silkworm continues to spit out cocoon silk, and the spinning mode changes from S to ∞ shape, and the cocoon forming process begins.
When the silkworm's body is greatly reduced due to a large number of silkworms, the swinging speed of the head and chest slows down without a certain rhythm, and the silkworms begin to appear messy, forming a loose and soft cocoon silk layer, which is called pupa lining. Finally, the silkworm's head is up and its tail is down, and the silk material remaining in the body is spit out to form a soft cocoon top, and the process of spinning and cocooning is over.
The content of this article comes from: China Agricultural Development Report by China Agricultural Publishing House.
The difference between female and male silkworms.
There are four transparent points on the ventral surface of the eighth and ninth nodes of female silkworm. There is a transparent point in the center of the ventral surface of the ninth section of the male silkworm. There is a straight line in the center of the ventral surface of the eighth and ninth sections of the female pupa, which separates them. The male pupa has a pair of small protrusions in the center of the ninth ventral surface of the abdomen.
From the point of population development, compared with female silkworm, male silkworm develops faster than female silkworm, and its body shape is slightly smaller and upward. The development of female silkworm is slow, the silkworm body is enlarged, and the upward trend is not obvious.
Extended data:
Silkworm is a kind of abnormal insect, the most common one is silkworm, also called silkworm, which is one of the economic insects that cocoon on mulberry leaves. Silkworm originated in China, its development temperature is 7 ~ 40℃, and its suitable feeding temperature is 20 ~ 30℃. Silkworm babies feed on mulberry leaves After eating mulberry leaves continuously, the body turned white and began to peel after a period of time.
When peeling for a day or so, if you can't eat or move like sleeping, it's called "dormancy". Once peeled off, it is a second-instar larva. Even if you molt once, it will increase by one year, and the larvae molt four times to become fifth instar larvae. After eating mulberry leaves for 8 days, they will become mature silkworms and start spinning and cocooning.