CATDOLL : CATDOLL: How to prevent diseases in third and fourth instar silkworms? What medicine should be used when diseases occur?

How to prevent diseases in third- and fourth-instar silkworms? What medicine should be used when diseases occur?

Disinfection and disease prevention during the young silkworm period and key technologies

"Disinfection and disease prevention" must be implemented throughout the co-rearing of young silkworms, and the key technical links of disinfection before silkworms, disinfection during silkworms, and disinfection at the end of the breeding period must be grasped:

1. Disinfection before raising silkworms.

Based on the principle of thoroughness and effectiveness, on the basis of comprehensive cleaning, targeted disinfection agents are used, and post-disinfection management is strengthened. It should be noted that:

1. The water used for cleaning must be of good quality. It is strictly forbidden to clean silkworm tools in stagnant ditches, ponds or rivers.

2. The cleaned garbage should be piled up in pits far away from the silkworm house and mulberry garden, sealed with mud and fermented;

3. Focus on the types of silkworm diseases that occurred in the previous season or last year, and carry out targeted disinfection, which should be carried out in stages and thoroughly. For example, use 2% lime slurry for viral diseases and "402" for fungal diseases; use Xiaoshaqing, Duxiaosan, bleaching powder, etc. for comprehensive disinfection.

4. To improve the disinfection effect, immersion disinfection should be carried out for no less than 1 hour, spray disinfection should be carried out for half an hour, and fumigation disinfection should be carried out in a sealed environment for more than 24 hours (24°C). Lime slurry should be used in a suspension, bleaching powder should be used in a clarified solution, and the poison should be fully smoked to dissipate.

2. Disinfection during the silkworm period.

During the silkworm rearing period, the germs and viruses in the silkworm room will be gradually accumulated along with the introduction of personnel, mulberry leaves and air. Therefore, disinfection and disease prevention must be carried out throughout the whole process, during which the following must be noted:

1. It is essential to disinfect the silkworm bodies and silkworm seats with regular powder (fresh lime powder, anti-rigidity powder) for ant silkworms, silkworms of all ages and mulberry, and it should be used on time and in the right amount;

2. Strengthen targeted treatment according to the climate and silkworm room environment, such as adding fresh lime powder when it is humid, and strengthening anti-stiffness treatment when mulberry garden pests are prone to stiffness disease, using more anti-stiffness powder, etc.;

3. When the air in the silkworm room is polluted by dust due to sand removal, use 0.5% disinfectant or 1% effective chlorine bleaching powder solution to disinfect the air and the ground;

4. Carry out daily disinfection and cleaning of small silkworm tools such as silkworm nets, films, and mulberry training utensils.

3. End disinfection.

At the end of the co-cultivation, disinfection should be done well, mainly:

1. Disinfect the silkworm bodies and silkworm seats before distributing the silkworms. The amount of anti-stiffness powder used should be moderate and more. When the silkworm farmers take the silkworms back, they should disinfect them with anti-stiffness powder again immediately.

2. When distributing young silkworms, the sand should be removed before distribution. Do not take the silkworm excrement out of the co-rearing room. To prevent damage to the silkworms during dispersal, use a film silkworm net to remove the sand.

3. To prevent outdoor pollution, young silkworms are kept in a flat silkworm net and not taken out of the rearing room;

4. After the young silkworms are distributed, they should be cleaned and disinfected immediately, and the silkworm equipment should be properly stored and not used for raising adult silkworms.

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How to prevent diseases during the silkworm period?

Disinfection and disease prevention work during the silkworm breeding period must be done as follows:

⑴ Insist on "washing hands three times" and "changing shoes two times". That is, wash hands before entering the silkworm room, wash hands after cutting leaves, and wash hands after removing sand. Change shoes before entering the silkworm room and leaf storage room.

⑵ Adult silkworms and small silkworms should be raised together in different rooms, and silkworm tools should not be mixed. Silkworm bodies, silkworm seats, silkworm rooms and silkworm tools should be disinfected regularly.

⑶ Eliminate sick and weak silkworms in time, and burn them in batches or bury them deep with lime.

⑷ Pay attention to the safe use of pesticides to prevent poisoning from pesticide waste gas.

⑸ Eat good mulberry leaves and do not feed them with insect-infested leaves, muddy leaves, or spoiled and fermented leaves.

⑹Insist on using disease prevention drugs to disinfect silkworms or add food.

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Key points of disease prevention and disinfection during the silkworm period

The key to disease prevention and disinfection during the silkworm period is the silkworm body, silkworm bed, silkworm room, silkworm tools and other silkworm-related links. It is also a continuation of the disinfection before silkworm rearing. We must conscientiously implement the principle of prevention first, comprehensive prevention and control, and the combination of prevention and treatment to ensure the safety of silkworm rearing. The key points are:

1. Establish a disease prevention and hygiene system, and implement the following steps: first, clean; second, change; and third, wash hands.

First cleaning: After washing the indoor and outdoor environment once a day, disinfect it with 0.5% bleach solution. Second changing: When entering the silkworm room or mulberry storage room, you need to change your shoes or step on the ash (fresh lime powder) before entering the room. Third washing hands: Wash hands before entering the silkworm room, before adjusting and feeding mulberry, and after removing sand.

2. Disinfection of silkworm bodies and silkworm seats.

①. On the day of harvesting and before feeding silkworms of different ages, sieve a thin layer of anti-rigidity powder on the silkworm bodies and silkworm seats. After 10 minutes, add a net to the mulberry. If rigidity occurs, sprinkle the anti-rigidity powder once a day. The effect will be better if combined with fumigation in the silkworm room. ②. In the young silkworm stage, use Panax notoginseng bran to disinfect the silkworm bodies and silkworm seats; in the adult silkworm stage, use fresh lime powder to directly disinfect the silkworm bodies and silkworm seats. Note that it should not be used too much before sleeping or when putting on the cocoon. Fresh lime powder can effectively prevent and treat viral diseases and keep the silkworm seats dry.

3. Add food and disinfect.

①. After the third instar, the leaves are fed and 500 units of chloramphenicol can be added to the food every other day to prevent bacterial diseases. If silkworm diseases are found, the food can be added three times in a row.

②. During the peak feeding period of the fourth instar, 500 times the amount of silkworm fly killing liquid can be added to the feed. During the fifth instar, use the liquid once on the second day, and then every other day to prevent and control maggots.

4. Leaf disinfection.

In areas with microparticle poison sources, the leaves can be disinfected with 0.33% effective chlorine bleach solution. Dipping disinfection is used during the young silkworm stage, and direct tree disinfection can be carried out during the adult silkworm stage.

5. Silkworm feces processing.

Put the silkworm feces bags into the pit, and it is strictly forbidden to let the silkworm feces fall to the ground. After removing the sand, the silkworm nets should be cleaned up in time and exposed to the sun.

6. Eliminate weak silkworms.

Combined with the dormancy and wake-up treatment, weak silkworms are eliminated, and the elimination rate is controlled at about 2%, ensuring the overall strong physique and uniform development, without affecting the yield per unit, and effectively improving the cocoon quality and benefits.

What medicine to use at 4 o'clock

Sericulture technology and drug use

answer

1. Disinfection: 7 days before breeding, disinfect the silkworm room and silkworm tools with 1% strong chlorine. 2. Temperature management: Silkworms are temperature-changing animals, and the optimal temperature for growth is 20-30°C. 3. Timely accelerator: When 20% of the silkworm seeds are green, use black cloth to block the light, and use light to incubate after 3 days. 4. Scientific management: Feed 2-3 times a day. If the young silkworms are sick, disinfect them in time. 5. Maintain hygiene: Clean up silkworm feces and remaining mulberry leaves in time.

1. Sericulture Technology

1. Preparation

(1) Prepare the silkworm room and silkworm tools in advance. Disinfect them with 1% chlorine essence 7 days before breeding. The amount of liquid used is half a pound per square meter. After spraying, seal the silkworm room for more than 24 hours. The area around the silkworm room should also be sprayed for disinfection.

(2) When raising silkworms, fresh mulberry leaves must be provided. Do not feed them mulberry leaves that have been stored for a long time, otherwise it will easily cause various diseases.

2. Temperature management

Silkworms are temperature-changing animals, and their adaptability to temperature ranges from 20-30°C. During the spring silkworm period, the weather is cold and humid, so it is necessary to replenish the temperature and remove moisture. During the summer silkworm period, the weather is hot and humid, so it is necessary to reasonably cool down and remove moisture to maintain good air circulation in the silkworm room. During the autumn silkworm period, it is easy to encounter hot and dry weather, so it is necessary to replenish moisture indoors in a timely manner.

3. Timely expediting

Eight days after the silkworm eggs are taken out of the warehouse, small black spots can generally be seen on the silkworm eggs, which are called green spots. When there are 20% green spots on the silkworm eggs, use black cloth to block the light. Starting from the day of the green spots, the black cloth should be removed at 5 am on the third day, and the lights should be turned on for hatching.

4. Scientific management

(1) Feed the silkworms 2-3 times a day. During the breeding period, do not use mosquito coils, perfumes or other items with strong odors in the silkworm room to avoid causing the death of the young silkworms.

(2) Diseases that occur in silkworms are mainly preventable. After the disease occurs, special drugs must be used for disinfection. Sick silkworms must also be handled promptly and not discarded at will to prevent the spread of the disease.

5. Maintain hygiene

Clean up silkworm feces in time. If silkworm feces accumulate in large quantities, it is easy to breed bacteria and cause diseases. In addition, the shed skins of young silkworms and the leftover mulberry leaves should also be cleaned up in time.

2. Method of use

1. Formaldehyde solution

Seven days before raising silkworms, use a 2% formaldehyde solution to sprinkle in the silkworm room, 2 kg per 10 square meters. Then keep the temperature above 24°C (for 5 hours) and seal it for 1 day and night. This can prevent protozoa, viral diseases, bacterial diseases, fungal diseases, etc.

2. Lime powder

7 days before raising silkworms, sprinkle 0.5% lime powder in the silkworm room, 2 kg per 10 square meters. Then keep the temperature above 24°C (for 5 hours) and seal it for 1 day and night to prevent bacterial diseases, fungal diseases, etc.

3. Notes

(1) Wear a gas mask or cover your mouth and nose with a wet towel during medication application and take turns applying the medication.

(2) The above-mentioned drugs are mainly used for disinfection of silkworm rooms, mulberry storage rooms, cluster rooms, aging rooms and various silkworm tools.

(3) Lime powder should be ensured to be fresh and stirred while being disinfected. Due to its high volatility, it must be prepared and used on the same day, otherwise it will become ineffective after one day.