Silkworm seed development technology

The neat development of silkworm eggs is the primary guarantee for the implementation of automatic clustering of silkworms and an important prerequisite for ensuring high quality and high yield of silkworm cocoons. In order to make silkworm eggs develop neatly, we must do a good job in the following aspects:

First, do a good job in the protection of silkworm eggs after recovery and promote neat hatching.

Immediately after recovery, the silkworm eggs were poured out and spread flat in the foil of white paper, and placed in a temperature of 26 ℃, a dry-wet difference of 1.5 ℃, and a dark environment (covered with black cloth). On the day of hatching, the cover was opened at 4 ~ 5 o'clock in the morning, and the light sensitivity was turned on to promote neatness of hatching. Ant collection is carried out from 8 to 9 o'clock. If you finish harvesting at the end of the day, continue to carry out protection according to the above requirements, and harvest again the next morning, the ant silkworms collected the next day should be placed on a rack 1 / 2 layers higher than the silkworm on the first day. At the same time, mulberry leaves should be given two more times a day. When the growth is basically the same as that of the silkworms on the first day, no more leaves will be given, and interlayer positions are often exchanged, so that all silkworms are completely consistent in feeling temperature, humidity, light and eating mulberry leaves. To promote the neat development of the population.

Second, select suitable mature mulberry leaves to ensure the neat development of silkworm eggs.

Mulberry leaves are the only feed for silkworm eggs. The quality of mulberry leaves has a direct impact on the development of silkworms, especially the old and tender mulberry leaves, which is most likely to cause a large gap in the development of silkworm populations. therefore, it is particularly important to select mulberry leaves suitable for silkworm development.

According to the physiological characteristics of silkworm in different periods, the first instar silkworm collects 2 to 3 leaves from the top of mulberry branches, the second instar silkworm collects 4 leaves, and the third instar silkworm collects 6 leaves to 5 instar silkworms, and the mulberry leaves newly grown from the top of the branches are kept for tree rearing, so that the needs of silkworm body development can be ensured. And each mulberry should be evenly seated, so that the distribution of silkworms, mulberry quantity and times should also be the same, in order to make the population development of silkworms neatly.

Third, rate food pressure approval, promote tidiness

After sleeping, the silkworm called the mulberry leaves "rate food" for the first time. Rate feeding pressure approval is a key link to promote the tidiness of silkworm population. In general, as long as ant collection and breeding are carried out in strict accordance with the requirements, the development of silkworm eggs is very neat. However, in production, the level of rates and food is often not well grasped, and it will turn the same batch of silkworms into two or even three batches, which will bring a lot of inconvenience to feeding and management.

According to the strong hunger tolerance of silkworm eggs after peeling (sleeping), the feeding time must be postponed, that is, when a batch of silkworms are all peeled and crawl around with a strong desire for food, can carry out disinfection, rate food (to mulberry leaves). Moreover, every sleeping period must be like this, in order to achieve the purpose of pressure approval and promoting the neatness of the silkworm population. Otherwise, if the mulberry is given too early, the silkworm that sleeps first eats mulberry leaves early, and the later silkworm eats mulberry leaves late, which naturally causes a large gap in the development of silkworm populations, which is very easy to induce silkworm disease, and is not convenient for feeding and management, but also not conducive to automatic clustering.

To sum up, in order to make the silkworm population develop neatly, the first is to do a good job in the protection of silkworm eggs to promote neat hatching; the other is to strengthen the management in feeding so that the mulberry leaves eaten by silkworms should be in line with their physiological characteristics. And the group is consistent in the quality and quantity of eating mulberry, feeling the same temperature, humidity and light; third, press the batch as far as possible when feeding, wait for the whole batch of silkworms to take off the skin and then eat, to ensure that the silkworm population develops neatly.