Identification and prevention of silkworm disease, silkworm disease prevention and control methods,

1. All silkworm pus disease is the main disease of silkworms, which occurs at all stages of silkworms, which is extremely harmful to silkworm production and is the great enemy of silkworm production. The prevention and control of the disease must adhere to the principle of giving priority to prevention, and the disease prevention work must run through the entire silkworm period. The main control measures are:

1. Adhere to a strict disinfection and disease prevention system. The silkworm room should be "two eliminations and one washing", and in the process of raising silkworms, it is necessary to do "three washing hands and two changing shoes", that is, washing hands before picking leaves, cutting leaves, and feeding leaves, and changing shoes when entering and exiting the silkworm room, and as far as possible to achieve the separation of people and silkworms, and try to avoid people and silkworms in the same room, so as to facilitate disinfection.

2. Expand the seat in time, evenly sit, keep one silkworm and three places, and prevent the silkworm head from being too dense.

3. Remove sand frequently, prevent residue fermentation and food infection, and reduce pathogens.

4. Insist on sprinkling small silkworms, large silkworm disease prevention No. 1 or fresh lime powder before feeding the leaves every day for silkworm body silkworm seat disinfection and sand separation.

5. Strict leaf picking standards, the leaves used in the small silkworm period should be ripe and tender, and the old mature leaves can not be fed, and the mature leaves can not be fed in the silkworm period.

6. Strictly raise the green in batches, and strictly prohibit the mixed cultivation of large and small silkworms.

7. Feed in a timely manner to prevent hungry silkworms, that is, the leaves can be fed uniformly only after more than 95% of each age sleeps.

8. Strictly eliminate diseased silkworms, weak silkworms and dormant silkworms.

9. Control the optimal temperature, humidity and dry-wet difference of each age silkworm stage, the specific requirements are: 1 3 instars, 27 28, dry and wet difference 1, 4 5 instars 24 26, dry and wet difference 3 4.

10. Insist on adding disease prevention drugs in a timely manner to enhance the physique and disease resistance of silkworms, that is, starting from the second leaf of the second instar silkworm, add anti-disease drugs once a day. Edible drugs include cocoonin, erythromycin, Tencel Bao, Silkworm Rehabilitation No. 1, etc.

There are many types of silkworm diseases, the most common being pus, stiffness, and pesticide poisoning. Puscular disease is generally, the link is swollen, the body color is milky white, the action is noisy and rolling, the skin is easy to break, and the milky white pus is flowing, or some silkworms are uneven, the size is different, the sleep is uneven, the development is slow, the body of the diseased silkworm is thin and small, and the mulberry diet is reduced or not eaten. Stiffness is generally a disease on the surface of the sick silkworm with dark brown or oily lesions, vomiting and soft stools before death, and gradually hardening the corpse after death, with white, yellow, red, etc.

Pesticide poisoning silkworms generally suddenly stop eating mulberry leaves, irritability, crawling, constantly rolling, spitting out green gastric juice, thick chest and tail small posture, prolapse anus, or head and chest contraction and swing on both sides, crawling and rolling, convulsions to death, dead silkworm head sticking out, body into "S" or "C" shape, etc.

<> the occurrence of silkworm disease is mainly caused by midgut pus and hollow softening disease, and at present, due to the different time and climatic conditions of silkworm raising, blood type pus, stiffness and other silkworm diseases are the main ones.

Hematotype sepsis (commonly known as climbing silkworms, grandmother silkworms).

1 The main causes of the disease. Due to the incomplete detoxification, the existence of viruses, the tenderness of mulberry leaves, the high moisture content, the high temperature and humidity of the silkworm raising environment, and the lack of green treatment of steaming heat and sleep, the mixed breeding of healthy silkworms and diseased silkworms infects each other.

2 Prevention and control methods. Each time before the mulberry to the silkworm milky, manic crawling of the sick silkworm extraction into a lime container to bury deeply, then wash hands, with fresh lime powder for silkworm body silkworm seat disinfection, l 2 times a day. Pay attention to the maturity of mulberry leaves in feeding, do not eat young leaves, immature leaves (the age of the leaves for the new shoots of the 2nd and 3rd leaves, the second instar of the leaves for the new shoots of the largest leaf residue of the branches, the third instar of the leaves for the three eye leaves, the fourth instar of the leaves for the whole bud leaves), and pay attention to indoor ventilation, l 2 years of sleep in the silkworm room to have air convection windows, 3 4 years of indoor air to flow through the partner, 5 years to open the door and window to raise silkworms, such as rainy days when the mulberry leaves are wet, more attention should be paid to the door and window silkworms.

Stiffness. The conidia (white hair) of stiff disease are brought in by the outside world such as wind blowing and mulberry leaves, and after falling on the silkworm body, they burrow into the silkworm body through l0 l2 hours, absorb the nutrients and water of the silkworm body to maintain life, and after one day, the silkworm body is drilled out to generate hyphae and conidia, and then transmitted to the healthy silkworm through the conidia.

l Cause. The presence of stiff conidia, coupled with high humidity in the air, is conducive to the growth of stiff conidia, and is generally prone to disease in rainy spring, summer, and late autumn.

2 Prevention and control methods. Eliminate the sick silkworm in time, grasp the white before the carcass of the sick silkworm catches, prevent infection, catch the sick silkworm are burned or deeply buried, in the breeding to eliminate the sleepy silkworm and the sleepless silkworm in time, at the same time to do a good job of ant silkworm, silkworm, ripe silkworm and other silkworm susceptible period of silkworm body silkworm seat disinfection.

Prevention and control of mild disease: In addition to the conventional disinfection of the silkworm body and silkworm seat, the silkworm body should be disinfected once a day during the fifth instar period, and the scorched bran lime should be sprinkled in sleep to keep the silkworm seat dry.

Prevention and control of severe disease: In addition to the conventional disinfection of the silkworm seat of the ant silkworm, the silkworm and the mature silkworm, the fifth instar should also insist on the disinfection of the silkworm seat twice a day, and the pressure in the middle of sleep should be changed from lime to anti-stiff powder.

The special agents for the prevention and treatment of zombie disease are: anti-zombie powder, euchlorine anti-stiffness powder, antibacterial agent 402, which can also be fumigated for fumigation and disinfection, and can also be sprayed with 200 times liquid spray during the silkworm stage.