How many times a year can you raise silkworms in the weather in Shanghai?

Generally, it can only be raised once a year. I have raised the importance of temperature and humidity. Silkworm is an insect, belonging to a temperature-changing animal. Its body temperature doesn't keep a certain temperature as people do. With the increase or decrease of the ambient temperature, the silkworm's body temperature also becomes higher or lower. This is because the silkworm body wall lacks the structure of regulating body temperature and is easily affected by external temperature. The humidity in the air also directly affects the moisture emission, body temperature regulation and substance metabolism of silkworm. (2) The external temperature has a great relationship with the growth and development of silkworms. If the silkworm stays at the temperature of 2℃ for a long time, it will stay in motion, develop slowly, lose weight, become smaller, and the cocoon yield and quality will be reduced. If the silkworm is at a high temperature above 3℃ for a long time, it will also have developmental difficulties and decline in metabolism, and it is easy to get sick. In addition, the water needed by silkworms comes from mulberry leaves. If the humidity in the silkworm room is too low and too dry, the silkworm will evaporate more water from the body surface, and the water obtained from mulberry leaves will not meet its needs, which will hinder the growth and development of silkworm, and mulberry leaves will also be easy to dry up and suffer losses. If the humidity in the silkworm room is too high and too humid, the water in the silkworm body is slowly distributed, and there is too much water in the silkworm body, and the silkworm body is puffy and prone to infection and illness. (3) Appropriate temperature and humidity for silkworm rearing. Silkworms have strong resistance to high temperature and humidity. Generally, the silkworm room is kept at 25 ~ 28℃ and the relative humidity is 75% ~ 8%. Silkworm is suitable in an environment with low temperature and humidity and good ventilation. Generally, the silkworm room is kept at 23 ~ 24℃ and the relative humidity is 6% ~ 7%. (4) the relationship between the weather and the occurrence of silkworm diseases 1. The low temperature is easy to induce the outbreak of stiff diseases. It is more dangerous in the small silkworm period and rainy conditions. 2, high temperature, easy to induce the outbreak of purulent disease (white belly). It is more dangerous in the big silkworm period and in the case of sultry and rainy weather. 3. In the case of little rain and dryness, silkworms are prone to not eating fresh mulberry leaves, and their physique is poor, which makes them easy to get sick. Put it in a paper box or a small sieve for sieving rice, and put some paper pads at the bottom of the sieve if using a sieve.

When the young silkworm just hatches from the egg, it should be treated with special care. Feed it with tender mulberry leaves, and move it with a soft brush when changing mulberry leaves. Pay attention to strength. Sometimes the mulberry leaves are too dry, and if you are not careful, you will leave the young silkworms on the mulberry leaves to be discarded in the process of changing mulberry leaves. It is difficult to raise when you are young, but it will be easy when you grow up.

when it wants to bear cocoons, just take some wheat stalks and tie them into branches.

After the cocoon is broken, put them together in a box, they will mate together and then lay eggs. Sometimes because there are few silkworms, moths will be alone when they break cocoons, but don't worry, as long as a pair of silkworms succeed, I believe it will be enough for you to raise.

Mulberry leaves should be fresh. You can also collect one plastic bag at a time, use several pieces every day, and sprinkle some water on the rest to keep them fresh in the refrigerator. The collected leaves will have a certain amount of dust, which can be washed and dried, and must be dried, otherwise the young silkworm or the big silkworm will have diarrhea after eating it, and maybe even die.

Silkworm rearing techniques

1. Spraying mulberry leaves is used for feeding silkworm rearing: add 5 ml of fermentation broth to one kilogram of water, and spray 1 kilograms of mulberry leaves once a day. Silkworms love to eat, their feces are not smelly, they grow fast, their cocoons are thick and of good quality, and their yield can be increased by about 1%.

second, second, spray silkworm body to cool down and relieve summer heat: when the temperature is high in summer, silkworm is easy to get sick, and when the room temperature is too high, silkworm is easy to die of heatstroke. Can be in hot weather, according to a catty of water and 5 ml of fermentation broth, sprayed on the silkworm body, sprayed once a day in the afternoon.

3. Spray mulberry leaves for preservation: The temperature is high in summer, and the collected mulberry leaves will turn yellow and deteriorate if piled up for a long time. In autumn, the climate is dry, and the collected mulberry leaves will dry up and harden if left for a long time. You can add 5 ml of fermentation broth to spray the mulberry leaves wet, then put them into woven bags or pile them on the ground, cover them with plastic sheets, and keep them fresh green for 24 hours.

fourth, fourth, spraying mulberry leaves to promote growth: adding 1-2 ml of fermentation broth to one catty of water, spraying mulberry leaves in mulberry fields for 2-3 times a month, and adding .2% potassium dihydrogen phosphate is more effective. It is advisable to spray the mulberry leaves until they are all wet and not dripping. Mulberry leaves grow fast and the leaves are oily and green, which can increase the yield by 2-25%. It can also reduce pests and diseases.

Note: Antibiotics should not be used for 6 hours before and after using the fermentation broth of Vigor 99 starter. No matter how long the fermentation broth is preserved, it can be used as long as it still smells sweet and mellow. If it stinks, it cannot be used.

what should we pay attention to when raising silkworms in summer and autumn?

first, prevent pesticide poisoning. Don't spray organochlorine pesticides such as dimehypo on the farmland near the silkworm room during the silkworm rearing season, because its fumigation will lead to silkworm poisoning; Feeding silkworm leaves should be confirmed to be non-toxic after trial feeding, and then leaves can be picked and fed to silkworms.

2. Mosquito-repellent incense or mosquito-killing and insect-killing agents are prohibited in silkworm rooms. When used in houses adjacent to the silkworm room, the doors and windows of the silkworm room should also be closed to prevent silkworm poisoning.

Third, screen doors and screens should be installed in the silkworm room to prevent flies from entering the silkworm room and harming silkworm children, and "silkworm fly-killing" emulsion or silkworm spray should be added to kill flies and maggots.

Fourth, before raising silkworms, the rat hole should be blocked, the silkworm rack should be kept at a certain distance from the wall, and lime powder or silkworm medicine should be sprinkled around the legs of the silkworm rack to prevent rats from climbing up. To raise ground silkworms, it is necessary to do a good job of killing rats with drugs.

The temperature of silkworm rearing is high in summer and autumn, so it is necessary to open doors and windows and strengthen indoor ventilation. Spraying clear water on mulberry leaves and blowing a breeze indoors with an electric fan are also beneficial to indoor cooling.

6. If sick silkworms are found, they should be cleaned up in time, put into a disinfection basin filled with bleaching powder solution or lime slurry, and forbidden to feed sick silkworms to livestock and poultry, so as to prevent the spread of pathogens and pollute the environment.

7. Silkworm excrement contains a large number of pathogens, so it should not be spread around the silkworm room, but should be concentrated in the wild for composting or put into a cesspit for composting to prevent the spread of pathogens.

8. The high temperature in summer and autumn leads to the rapid propagation of pathogens. Attention should be paid to picking leaves on demand, transporting them in time and storing them reasonably. The mulberry storage pond should be disinfected once every age, and don't feed mulberry leaves overnight.

9. Avoid feeding wet leaves in hot and humid weather. Don't sprinkle water when storing mulberry leaves. Be diligent in removing sand, and sprinkle more fresh lime powder, dried straw and other materials to prevent germs from breeding.

1. It's not the sericulture season. Don't store grains, bran and other things in the silkworm room, so as not to get damp and produce mites, which will harm silkworm children when raising silkworms.

what's the trick of keeping silkworms and saving mulberry?

Under normal circumstances, it takes 15 kilograms of mulberry leaves to produce 1 kilogram of cocoon. After adopting the measures of saving mulberry, each silkworm egg can save about 5 kilograms of mulberry, but the cocoon production and quality can not be affected at all. The measures to save mulberry are as follows:

1. Mulberry leaves should be collected, transported and stored reasonably. Try to pick leaves in the morning or evening, transport them with them, and express them loosely. After the collected mulberry leaves are shaken loose, they are put into a mulberry storage pool or a mulberry storage room for reasonable storage, so as to prevent the mulberry leaves from being wasted due to wind blowing or accumulation of heat and deterioration.

2. Prevent mulberry leaves from wilting. In the young silkworm stage, the bed (room) and plastic film mulching are used to keep the temperature and moisture, so as to keep the mulberry leaves fresh. Close the doors and windows properly after feeding the silkworms in the big silkworm stage, and then open the doors and windows for ventilation after eating away about 7% of the mulberry leaves, which can effectively prevent the mulberry leaves from wilting.

3. Ensure the temperature of the silkworm room. The suitable temperature for large and small silkworms is 24℃ and 25℃ respectively. In the suitable temperature range, the nibbling desire is strong, the defective mulberry leaves are reduced, and the conversion rate of shredded leaves is improved.

4. Promote less back breeding and strip mulberry breeding. Labor-saving sericulture techniques, such as plane three-dimensional rearing of young silkworms once a day, secondary rearing of all ages and mulberry rearing of big silkworms, not only improve the efficiency of sericulture, but also help silkworms eat mulberry leaves, saving about 5% of mulberry leaves compared with ordinary rearing.

5. Plan to use mulberry and ration mulberry. According to the different silkworm stages, the standard amount of mulberry should be formulated year by year, day by day and one by one, so as to ensure that "the silkworms are full and not wasted, and the silkworms are not hungry". At the beginning and end of each silkworm age, the amount of mulberry eaten decreases, so the leaves should be fed in moderation. The 5th instar silkworms should be fully fed during the peak feeding period, but the maximum daily mulberry consumption should be controlled within 11kg.

6, add ecdysone. Silkworms are about 5% ripe. Using one ecdysone for each seed, adding 25 kg of water, mixing 2 kg of mulberry leaves, and eating them all at once can promote the silkworms to mature together, and each seed can save about 1 kg of mulberry leaves.

how to do a good job in several key technical links of sleep wake-up treatment?

treatment from sleep is a very important sericulture technology, and whether it is handled well or not is related to the health status, morbidity and cocoon production of silkworm children. Therefore, we should focus on the following technical links:

1. Sleep in time. When the young silkworm develops quickly, it sleeps quickly and the sleep period is short, so it is advisable to sleep early; The hypnotic period of the fourth instar silkworm is long, so it is better to get off the net later. It is advisable to sleep early in high temperature and humidity, late in low temperature drying, early in the morning and late in the afternoon. When a small number of silkworms (2-3 silkworms) are found in the silkworm bed during dormancy, sprinkle bran ash or fresh lime powder (to make the silkworms climb up quickly) and add a sleeping net to the mulberry (the mulberry leaves are ripe and slightly tender), and then all the silkworms can climb up. If you add a sleeping net at night, you should give mulberry leaves early the next day and then sleep.

2. Green extraction in batches. After sleeping, feed two mulberries, and all the silkworms will fall asleep, so there is no need to raise the green. A very small number of weak late-sleeping silkworms in the seat will be eliminated by hand. If half of them are not asleep, the silkworms are divided into two batches by the central batch method. The method is: the silkworm sleeps for half, then adds a sleeping net once and gives it to the mulberry evenly, so that the silkworm can climb the net and move to a nest to feed and sleep. If the growth and development of silkworms are uneven, a large number of sleeping silkworms are separated by the method of lifting the center into two heads, and the early-sleeping silkworms and late-sleeping silkworms are raised in the nest when the silkworms are paid for food.

3. Management during sleep. Silkworms should keep quiet and ventilate after sleeping to prevent direct sunlight. In hot and humid weather, it is necessary to sprinkle bran ash or lime powder on the silkworm seat to absorb moisture, which not only prevents germs from breeding, but also prevents the residual mulberry from getting up early and causing uneven development.

4. Pay for food timely: Pay for food late, that is, pay for food when the silkworm has basically molted and 8-9% of its head is light brown. In case of high temperature, sultry weather or white rain, you should pay for food early. Generally, you will be paid for food 5-7 hours after you see it. Before eating at all ages, the silkworm body should be disinfected, and then the mulberry should be given to the net, and the mulberry should be fresh and tender.

5. control daily sleep. To control daily sleep, we should focus on three or four sleeps. Generally speaking, if you sleep for three days, you will sleep for a long time, and if you sleep for three days, you will sleep for a long time. Silkworms sleep every day, and mature silkworms are at noon, so it is convenient to cluster.

how to accelerate the growth of silkworm eggs and collect ants?

Silkworm eggs should be packed in ventilated bamboo cages or wire racks, and should not be packed with plastic films, cloth or newspapers to prevent them from being suffocated. Immediately after receiving the seeds, put them in the sterilized silkworm room for green protection. Keep 22℃ indoors from day 1 to day 4, and 25℃ from day 5 to incubation period. If the indoor temperature is low in spring, add the brazier to heat up and keep warm (use charcoal instead of firewood). The brazier is more than 1 meter away from the silkworm eggs, so as to avoid drying them to death. Remember to add water to replenish moisture when adding fire to heat up. On the eighth day of incubation, there is a small black spot at one end of silkworm eggs, which is called Dianqing. When 2% of the eggs in a piece of silkworm eggs are blue, wrap the silkworm eggs in newspaper, put the eggs face down, and darken them to make the silkworm eggs develop consistently. From the point of green day, it turns green the next day (the egg surface is gray), and the ant silkworm comes out of its shell on the third day. At 5: a.m. on the day of emergence, the shading is removed, and the light is turned on for light exposure, so that the hatching is neat and consistent. If there are late-hatched silkworm eggs, they should continue to be shaded and blackened, and then photosensitive ants should be collected at 5 am the next day. Finally, the ants are collected. The temperature is low in spring, around 1 am, and in summer and autumn, around 8 am. Mulberry used for collecting ants should be picked in the morning. Mulberry leaves should be ripe and tender, and the amount of mulberry used is 4-5 times that of collecting ants. Method of collecting ants: directly sprinkle the cut mulberry leaves on the silkworm egg paper, after 1-15 minutes, the silkworm ants climb onto the mulberry leaves, then pour the silkworm together with the mulberry leaves on the silkworm seat paper, and spread the silkworm evenly with goose feathers. After receiving the ants, the mulberry leaves for the second time should be detoxified. Use "Fangbing No.1" (a special medicine for disinfecting the silkworm body, which contains 1.25% formaldehyde for young silkworms and 2.5% formaldehyde for big silkworms) to spread the medicinal powder evenly on the silkworm body, and the dosage is like a thin frost. After 5 minutes, sprinkle a layer of burnt chaff (the chaff is burnt black) to separate the powder, and then give it to the second mulberry leaf.

what first aid measures should be taken after silkworm children are poisoned by pesticides?

1. Quickly open the doors and windows or take the silkworms to a ventilated place, sprinkle sand-separating materials, and add nets to remove sand and give them to fresh mulberry leaves.

2. Find out the source of poison quickly, cut off the source of poison, and avoid poisoning again.

3. Detoxification treatment: young silkworms are sprayed with clean water, and big silkworms are washed with clean water for two minutes, then taken out and dried in the shade, and some of them can be revived and fed to fresh leaves; All toxic appliances are washed with alkali and exposed to the sun. If you can still eat leaves after organophosphorus poisoning, you can add atropine appropriately.

4. For lightly poisoned and revived silkworms, nutrition should be strengthened, suitable and tender leaves should be given, and a small amount of them should be reared more. You can also add a small amount of sugar solution.