At present, in addition to the application of exterminating silkworm can effectively prevent and control myiasis, and antibiotics are used to prevent and treat bacterial diseases, other silkworm diseases can only be based on disinfection and prevention. Therefore, only by implementing a comprehensive prevention and control strategy for silkworm diseases based on disinfection, can silkworm disease prevention and control technologies be effectively combined with feeding management to achieve better results.
I. Eliminating pathogens and cutting off the route of transmission
1. Do a good job of disinfection of Jamsil and its surrounding environment, storage and mullion room, and silkworms. On the basis of careful cleaning, carry out drug disinfection. It is necessary to use high-efficiency and broad-spectrum antiseptic drugs, such as silkworms to disinfect nets, eliminate spermicides, eliminate Tetris and so on. Follow the method of use strictly. We must not only pay attention to disinfection before silkworm rearing, but also can not ignore the disinfection during silkworm stage and disinfection after silkworm stage, and permeate the whole process of sericulture production. Strictly raise the green in batches, isolation and elimination of weak silkworm and diseased silkworm. The use of fresh lime powder, Xiaojinling, etc., according to the standard silkworm body silkworm disinfection, to reduce the opportunities for mutual infection in the silkworm seat, to control the virus disease, fungal disease hazards.
2. Deal with three major sources of pollution: diseased silkworm, silkworm sand, and old earthworms. It was found that the diseased silkworms were immediately picked up and put into the disinfection tank. It was strictly forbidden to feed poultry and livestock with diseased silkworms and silkworm sands that were infected with silkworms to prevent the spread of pathogens. The silkworm sand should be composted in time to be fully fermented, and the heat should be used to kill pathogens. The silkworm sand without stacking can not be directly applied to the mulberry field or farmland, and it must not be spread in the silkworm or mulberry fields to prevent the spread of pathogens. Damaged and unusable grids should be burned immediately, and they can be used continuously. After being disinfected by smoke, they will be stored in the room.
3. Establish and improve the disease prevention and health system. Sang before, after the removal of sand to wash their hands; mulberry leaf baskets and sand baskets are strictly separated and regularly disinfected; a lime pit in the entrance of the silkworm room, put fresh lime powder in the pit, in and out of the silkworm room need to be disinfected by the lime pit; storage mulberry room is often washed and disinfected .
4. Special rooms store mulberry leaves. The reclaimed mulberry leaf is placed in a dedicated storage mulberry room. Mulberry leaves should not be stacked in the silkworm room to prevent pathogens from contaminating the mulberry leaf. The mulberry leaf was disinfected with a silkworm disinfected with a net 1000-fold aqueous solution or a bleach solution containing 0.4% of available chlorine (or bleaching powder essence solution).
Second, strengthen the feeding and management, improve the silkworm constitution
Although the disinfection work is currently an effective means to control the damage of silkworm in the sericulture production, even if it is fully sterilized, it is impossible to eliminate the pathogen completely. Therefore, it is extremely important to strengthen feeding and management, improve environmental conditions, and increase the resistance to disease and resistance of silkworms. We must rationally arrange the layout of sericulture according to local conditions, avoid the peak period of field crops as much as possible; choose silkworm varieties with strong resistance to disease and strong resilience; during the rearing, we need to create suitable conditions for silkworm growth and development according to the physiological characteristics of silkworms. Maintain proper temperature and humidity in the silkworm room, pay attention to ventilation, keep indoor air fresh, dry and clean the silkworms; strengthen management of mulberry field fertilizers, provide adequately cooked, fresh, nutritious and pollution-free mulberry leaves, and do a good sleep. In the sericulture process, attention should be paid to the use of silkworm medicines for symptomatic use, such as the addition of antibiotics such as Kesi mushroom capsules to prevent and treat bacterial diseases, and the elimination of silkworm flies to prevent and treat maggot disease.
Third, the correct selection of silkworm medicaments
At present, there are three main types of silkworm used in sericulture production. The first category is disinfectants, including formaldehyde preparations (such as formalin) and chlorine preparations (such as silkworms used to disinfect the net, Xiaosha Jing, Tetrin, and Xeroxin). Formalin, silkworm disinfection net, kill sperm and so is a high-efficiency broad-spectrum disinfectant, can be used for the disinfection of silkworm room, silkworm and mulberry leaves, Xiao Ling Ling for silkworm silkworm disinfection. The second category is therapeutic agents. Antibiotics (such as Kesi capsules, etc.) are mainly used to prevent and treat bacterial diseases, and silkworm flies are used to prevent and treat fly lice. The third category is physiological regulating agents, such as silkworm ecdysone solution. The selection of silkworm medicines in various areas of silkworm should be based on the performance of silkworm medicine, the occurrence of local silkworm diseases, the technical level of sericulture, equipment conditions, and climate and other factors, and should be based on the principle of symptomatic, safe, stable drug efficacy, and ease of use. Bombyx Virus Disease and Its Control
Blood type pus
Bombyx mori infection in the silkworm has two infections under the skin and wound infections in the skin. In the sericulture production, the infection is mainly caused by subcutaneous infections. After the virus on the mulberry leaves is eaten away, the silkworm will get sick. Trauma infections occur at the silkworm stage, and the virus invades the silkworm body from the silkworm skin wound and causes the disease. Whether the virus enters the silkworm body through the oral cavity or a wound, most of the infections that occur from silkworms or oligo-vegetative infections occur at the age of onset. When the virus is not infected at the age of the disease, it will develop at the early age. The incubation period is generally 3 to 4 days for small silkworms and 5 to 7 days for silkworms. Due to the different periods of onset, the symptoms of the disease are also different. Commonly there are no sleep, silkworm, silkworm, silkworm, silkworm, etc. Regardless of the symptoms, typical symptoms are common at the later stages of the disease: the skin is tight and shiny, and the body is milky, mad, and the skin is easily broken and dies out of the pus.