1, completely eliminate the source of infection At present, the most common source of infections of the bollworm is the dead bodies of dead insects such as dead bodies of dead silkworms, dead cage worms, silkworm excrement, silkworm litter, and pine caterpillars. These sources of infection contain a large number of conidia of Beauveria bassiana, and will continue to produce a large number of new conidia of Beauveria bassiana, which are emitted into the air and contaminate the mulberry leaves and contaminated silkworms through the spread of the wind. These sources of infection are not eliminated and every silkworm is threatened by Beauveria bassiana every moment. Therefore, we must first eliminate these dangerous sources of infection. In silkworm rearing, diseased silkworms and bodies must be promptly picked up, concentrated in water tanks soaked in deep bleaching water, or buried deeply; they must be cleaned of silkworm excrement, cleaned up with garbage and dust in the silkworm room, knotted room, and transported to the silkworm sand pond and silkworm sand Pits and silkworm sand houses shall be piled up or kept away from mulberry fields and silkworm fields. The film shall be covered with a film in a timely manner so that it can be fermented under high temperature and harmlessly treated to prevent contaminants from polluting the environment and mulberry leaves. Each sericulture household has the responsibility to jointly maintain the good sericulture and sanitation of the village and silkworm areas, and take strict measures to resolutely stop and eliminate random silkworm excrement, litter loss of dead silkworms, drying of silkworms everywhere, and raising The village of Sericulture has set up the acquisition of silkworms or went to the village of Tsengchuan Village of Sericulture to take down the bad behavior of silkworm and other pollution and sericulture environments. 2. Preventing the sale and distribution of co-cultured small silkworms with diseased silkworm If serious silkworm disease occurs in the small silkworm co-cultured in the communal room, the batch of small silkworms bearing the diseased silkworm must not be sold, distributed, and distributed to the sericulture households to avoid the outbreak of silkworm disease due to the silkworms. However, when sericulture households purchase and receive small silkworms, they must pay attention to checking whether dead silkworms and other dead silkworms are found. If dead silkworms are found dead, explain the quality of these small silkworms. If it is unqualified, there is a possibility that the population is infected and it is prone to outbreak of silkworm disease. Therefore, the co-culture of small silkworms with diseased silkworms should be rejected. During the process of transporting, distributing, and distributing co-cultured small-sized silkworms, attention should be paid to disinfection and disease prevention, and vehicles, utensils, and silkworms for transporting small silkworms must be strictly disinfected, and should not be sterilized in severely afflicted areas, silkworm acquisition sites, and silkworm excrement. The silkworm was distributed near the silkworm drying place. Each small silkworm should be covered with a thin film to prevent the silkworm body from being infected by the besoms of beauveria bassiana in the air during transportation, silkworm and collared silkworms. 3. Strengthen the disinfection of silkworm silkworms and silkworm silkworms After silkworm rearing, it is necessary to clean up, clean, clean the silkworm and silkworms in time, use a bleaching liquid containing 1% of available chlorine, or use a strong chlorine containing liquid containing 0.5% of available chlorine and bleaching powder (ie, Consumer) to control Jamsil. The appliance is fully sterilized 1 or 2 times. During the period of sericulture, trichloroisocyanuric acid fumigant (silkworm) can be used to sterilize smoke in the larval rearing room. The dosage is 1.5 grams per cubic meter for the indoor volume, 30 minutes after smoking, and the smoke is sterilized. Disinfecting indoor spaces and utensils can also play a role in disinfecting silkworm silkworms. Accept ants and all ages from silkworm disease prevention 1 (polyformaldehyde powder, divided into large silkworm, small silkworm only) or use bleaching powder anti-static powder (small silkworm period: 1 bleaching powder plus 12 lime powder preparation; silkworm stage : 1 part bleach and 8 parts lime powder), strong chlorine anti-static powder (50 grams of strong chlorine powder sieve evenly into 8.5 kilograms of lime powder, stir it to make it evenly with anti-static powder) . When it is found that there are silkworms, loose hair, hay, leaves, sawdust, chaff, etc. (with the best effect of pine hair) can be used as smoking materials to perform incomplete combustion, and doors and windows are closed in time, so that the silkworm chamber is filled with smoke and smoke is smoked for one hour. After the smoke is exhausted to the outside and continues for 1 time a day, it has a certain effect on repelling the conidia in the indoor air and reducing the infection of the zombie. 4, Mulberry leaves are fully sterilized to prevent mulberry leaf from spreading silkworm disease During the investigation, it was discovered that in the area where the disease is occurring, some sericulture households and cooperative hunters with good sericulture facilities and strong techniques have routinely sterilized the silkworm and silkworm worms, and have also insisted on the use of antler-free powders for silkworm body silkworms. The seat is sterilized, but it cannot always control the occurrence of zombies. What are the reasons? We believe that the reason is probably that the conidia of conidia have contaminated the mulberry leaves, and they were brought to the silkworm silkworm by Mulberry leaves. The conidia of conidiospores were brought into contact with the silkworm body, or were eaten under the worms, and contact infection and food intake occurred. Contagion leads to an outbreak of zombie. Therefore, we must pay attention to mulberry leaf disinfection. Forests near Mulberry Park have used Beauveria bassiana pesticides, or there have been many pine caterpillar zombies in nearby woodlands, or mulberry zoster dead bodies in mulberry mulberry leaves, mulberry leaves infested by mulberry mealworms, silkworm rooms and silkworm sand heaps In the nearby mulberry garden, the mulberry leaves may have been contaminated by the fungus. If these mulberry leaves are used for sericulture, bleaching powder containing 0.3% of available chlorine (1 kg of bleach and 90-100 kg of water) should be used half a day before leaf collection. Or with 0.3% chlorine bleach solution (1 kg bleaching powder plus 200 kg water), or with strong chlorine 0.3% chlorine (1 kg kg of strong chlorine plus 270 kg water), full-scale disinfection of mulberry Leaves, kill pathogens that adhere to the surface of mulberry leaves and prevent mulberry leaves from spreading silkworm disease. 5. Strengthen the pest control of mulberry The mulberry mealworms will be parasitized by the larvae of M. anisopliae, and other pests in the mulberry field will be parasitized by parasitizing fungi such as Beauveria bassiana, resulting in a large number of conidia contaminating the mulberry leaves, resulting in outbreaks and epidemics of the silkworm. It is necessary to spray pesticides in time, and 80% of dichlorvos EC 800-1000 times plus 40% dimethoate EC 800 times can be sprayed on mulberry fields and surrounding areas during sericulture.
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