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What Experts Share About Silkworm Breeding Techniques?

Growing mulberry to raise silkworms, if good techniques are applied, will bring high profits and help people rise out of poverty. What experts in the field have to say about silkworm farming techniques High yield? We invite you to learn about this topic in the content below.

Choose silkworm varieties

Although our country’s climate is hot and humid, the bisexual silkworm can be raised in all seasons of the year (from February to November). Luong Quang silkworm No. 2 (LQ2) is a good quality silkworm, originating from China, with white cocoons that can raise high-grade silk. In the market, this silkworm is called the Chinese variety, symbol 9 x 7 or 7 x 9 (commonly called head 9 or head 7).

For areas where it is not possible to raise two-breed silkworms in the summer crop, it is possible to raise hybrid golden silkworms, usually golden cocoons crossed with Chinese varieties marked KV x China. There are some areas that still maintain the golden cocoon silkworm breeding in the whole summer crop, often with low yield and low price of cocoons.

The selection of silkworm varieties directly determines the yield
The selection of silkworm varieties directly determines the yield

Silkworm farming season

+ Spring silkworms from February to May

+ Summer silkworms from June to the end of August

+ Silkworms are counted from September to November.

Raising silkworms in Spring must increase the heat for baby silkworms and prevent moisture when it rains in Spring – or for short, “increase heat, remove moisture”. Summer silkworms need to reduce heat and reduce humidity by creating ventilation in the house, if possible, add a ventilation fan, sprinkle lime on the silkworm’s feet and legs to absorb moisture. In the Fall crop, silkworm rearing is more favorable, but because the mulberry leaves become less, it becomes more difficult, but the quality of silkworm cocoons in the autumn crop is good.

Silkworms can be raised in Spring, Autumn or Summer
Silkworms can be raised in Spring, Autumn or Summer

Silkworm farming tools

need 1 – 2 sticks, 10 – 12 steps and 15 – 25 pots with a diameter of 1.2 m. Baby silkworms can be raised in boxes with dimensions of 45 x 75 – 80 x 10 cm, with nylon to cover the baby silkworms. In the silkworm chamber, it is necessary to install a hygrometer. Other tools such as knives, cutting boards, mulberry picking baskets, storage bins for mulberry leaves, nets for changing manure, drugs for silkworm disease prevention, etc. are available when needed.

On the day of hatching, opening the wrapping paper to expose the eggs to natural light will stimulate hatching evenly, focus on hatching at 7-8 am and silkworm tape at 9-10 am. The way silkworm tapes of two types of silkworm eggs are commonly produced are as follows:

Sticky egg silkworm tape: sprinkle sliced ​​mulberry leaves on egg paper, silkworms crawl on mulberry leaves, sweep silkworms to another cell, remove egg paper, if the eggs have not hatched yet, wrap them up for the next day.

Tape loose eggs (eggs packed in boxes): pour eggs onto paper, place them on the pan to spread evenly, eggs are stimulated by light to hatch. Use a net to place and sprinkle with mulberry leaves, when the silkworms reach the end of the net, move the mulberry to another nest to leave the eggshell. If the eggs have not hatched yet, pack them up for the next day to hatch the second batch.

Usually eggs hatch in 1-2 days, but can also last up to 3 days. On the first day of divination, a few children, on the second day hatch about 60-65%, on the third day hatch 30-35%, on the day of fortune-telling, the eggs hatch without tape so that the next day the tape focuses on 2 days. In case the pinned eggs are not wrapped to hang naturally in the house, the eggs are easy to hatch, lasting 1-3 days is normal, still well raised. The prolonged hatching is also due to insufficient humidity, dry, hot air, eggs that are too thick to pile up, and the ones below are also easy to hatch slowly.

When raising silkworms, farmers need to equip tools such as nets, boxes to preserve mulberry leaves, silkworm tapes...
When raising silkworms, farmers need to equip tools such as nets, boxes to preserve mulberry leaves, silkworm tapes…

Silkworm farming techniques

  1. Concentrated silkworm rearing phase (age 1 to the end of age 3)

a) Mulberry leaves

Mulberry leaves must be suitable for silkworm physiology at the silkworm stage, so there must be a separate mulberry garden for young silkworms, so VA-201 mulberry varieties should be planted. When planting, you must apply organic fertilizers in combination with inorganic fertilizers. reasonable. After each picking, it is necessary to fertilize with synthetic chemical fertilizers (nitrogen, phosphorus, potassium), after 2-3 batches of picking, it is necessary to fertilize with organic fertilizers, combined with potassium and phosphate fertilizers. Regularly plowing the flute to weed to avoid weeds competing for the nutrition of mulberry trees, making mulberry gardens open.

b) Hatching eggs

Temperature: 25-270C, humidity: 80-90%. When the eggs hatch, cover the egg box with a black cloth to block the light. Keep the darkness like that until 8-9 am the next morning, open the black cloth and race the eggs to a place with lots of light (near the window, lamp) and warm, the eggs will hatch and ice silkworms.

c) Silkworm ribbon

– Ice time; from 8 am to 10 am;

– Tape loose eggs: put eggs in a paper box, put on a tray or hatch silkworms, sprinkle mulberries for silkworms to eat. Before feeding the second meal, transfer mulberries and silkworms to silkworm nests/trays to remove eggshells;

– Tape cover eggs: silkworms are sprinkled with mulberries, silkworms crawl on mulberry leaves, use chicken feathers to sweep silkworms to another silkworm feeder/tray to feed the second meal;

– Mulberry leaves used to bandage silkworms: Use young mulberry leaves, light green, soft.

d) Feeding silkworms

Strawberry leaves are sliced ​​square or sliced. Feeding 3-4 meals a day.

Mulberry leaves should be chopped into fibers before feeding silkworms
Mulberry leaves should be chopped into fibers before feeding silkworms

e) Changing manure, sanitizing silkworms

– Age 1: change 1 time;

– Age 2: change 2 times (at the time the silkworms get up and before sleeping);

– Age 3: change once a day;

– Replace with nets: replace manure combined with silkworms, expand the area appropriately.

f) Handling sleeping silkworms

Silkworms stop eating mulberries, their bodies are yellow and shiny, they are sleeping silkworms. At this time stop feeding to thin silkworm tissue. After the silkworms wake up, feed the silkworms again. Newly woken silkworms feed 1-2 delicious mulberry meals at the right age for silkworms to develop good sex. When silkworms are asleep, they need to sprinkle lime chloride or papzol – B to prevent moisture and prevent diseases for silkworms.

g) Stocking density (for spawns with diameter of 1.1 m)

– Age 1: 1 box/1 bulb;

– Age 2:1 box/2 pot;

– Age 3: 1 box/4 pot.

h) Hygiene of disease prevention

The following preventive measures should be taken into account:

– Use disease-free eggs;

– Treat the environment with disinfectants: formalin, chlorine…

– Raising silkworms with the right techniques, regulating the appropriate temperature and humidity, feeding delicious mulberry leaves, so that the silkworms have the right density, removing the silkworms, diseased silkworms in time, silkworm droppings and excess mulberry leaves must be buried in the pit, incubated thoroughly. together with powdered lime and far away from silkworm rearing houses.

  1. Large silkworm rearing stage (age 1 to the end of age 3)

a) Prepare equipment and rearing room

Area of ​​rearing room: 20 -25 m2 for 1 box of 20 g eggs. The floor is cemented or tiled. There are mesh doors in the doors and windows to keep out flies. Prepare 7 kg of lime chloride or 10 kg of lime powder/box of silkworms.

b) Bringing silkworms to the floor

When silkworms reach the age of 4, they are transferred 2 meals to raise on the floor. Before spreading silkworms, it is necessary to spread a layer of powdered lime or lime chloride on the floor. After that, silkworms are left into beds 1 m wide, grooves go between 2 beds 1 m wide.

c) Feeding silkworms

Feed silkworms 3 meals a day, mulberries are spread evenly on silkworm tissue with the amount of mulberry suitable for each stage of silkworm development.

Raising large silkworms should pay attention to feeding silkworms 3 times a day
Raising large silkworms should pay attention to feeding silkworms 3 times a day

d) Change manure, stretch silkworms

– Change stools

Feeding silkworms at the age of 4 without changing manure, at the age of 5, feed the silkworms with 1 meal, then change manure in combination with silkworms. Alternative method: place the net on the silkworm tissue, feed the silkworms for about 2 meals, then remind the net to empty, clean the changed place and replace the next place according to the method of rolling mats. If raising silkworms with mulberry branches, there is absolutely no need to change manure during the rearing process.

– Silkworm relaxation

Stretch silkworms by spreading mulberry leaves 3 – 5 cm wider than silkworm beds at each meal, silkworms will automatically crawl out to eat and stretch their density. During the feeding process, if you see a thick spot, pick up the silkworms and move them to an empty spot.

e) Preventing diseases for silkworms

Use lime chloride or powdered lime to sprinkle on silkworms before the dinner on the first day to the fourth day of age 5. The amount of sprinkle is about 1 kg for 7-10m2 silkworms. From the 5th day on, there is no need to sprinkle the medicine anymore.

f) Controlling the culture environment

Due to raising silkworms on the floor, the entire space above is very open. The temperature difference between the floor and the height of 1.5 m ranges from 0.5 to 10C (depending on the conditions of the rearing room). Always open the door of the rearing room (only close the net) to let the air circulate to the outside (if it is hot, humid, and low wind, you need to use a fan to gently fan the upper part from 0.5 to 1 m above the silk tissue surface. ).

g) Feed silkworms with ripe silkworm medicine

When silkworms are ripe, about 5% of them can be fed with ripe silkworm medicine. Dosage of medicine for silkworms: put 1 tube of medicine 2 cc into 2 liters of water, spray and stir evenly on mulberry leaves, feed silkworms (1 box of silkworms feed about 2 tubes of medicine). After feeding, if the silkworms eat all the mulberry leaves, they must continue to feed the silkworms without spraying until the silkworms are fully ripe.

At the right time, you should feed silkworms with ripe silkworm medicine
At the right time, you should feed silkworms with ripe silkworm medicine

h) Ripe silkworms

When the silkworm is ripe, the silkworms are built into rows, the width of the bed is equal to the length of the silkworm. Put the dodge on the silkworm bed so that the silkworm automatically crawls up to dodge. Then set up a 20-250 slant so that the silkworms can excrete urine until the silkworms have fixed the position to start releasing the silk, then set the inclined guard at 70-75%, or shake the net (the type of net has a hole diameter of 0.5 – 1 cm) on the silkworm tissue, after the silkworm crawled up, shake the silkworm to dodge. The density of silkworms on silkworms is from 750 to 1,000 individuals/m2 (each box of silkworms is 12-13).

Return for 2 nights to ensure the temperature when going up to 30 – 320C, humidity 60%. After ripening 3-4 days, the cocoons can be collected.i) Cleaning after raising silkworms

After catching ripe silkworms, silkworm dung is collected and taken to compost. The floor and other farming tools are treated with a 50/00 solution of lime chloride. After 2-3 days of treatment, wash the house with clean water.

This is a summary of information about silkworm farming techniques that we want to share with you. Don’t be afraid to save the information you need to apply when needed.

Emilia Chaney
Emilia Chaneyhttps://agrisearch.net
My name is Emilia Chaney. I'm a social girl from Romania with a big smile and 3 passions: Agriculture, Travel and Social Media. I try to make this blog practical, full of great advice and inspiring ideas.

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