Silkworm disease control

The occurrence of silkworm disease is mainly caused by midgut purulent disease and empty malacia. At present, due to the difference of time and climatic conditions, silkworm diseases such as hematological purulent disease and stiff disease are the main causes.

Blood type purulent disease (commonly known as crawling silkworm, grandma silkworm)

The virus of blood-type purulent disease parasites in the blood of diseased silkworms, the blood of healthy silkworms is colorless and transparent, while the blood of diseased silkworms is milky white, so diseased silkworms are also called grandma silkworms. Once the silkworm gets sick with the aggravation of the disease, the diseased silkworm will crawl manic with milky pus, so it is also called crawling silkworm. The diseased silkworm spreads a large number of viruses on mulberry leaves and silkworm seats through crawling, so that the disease occurs after healthy nibbling of infected mulberry leaves.

1. The main cause of the disease. Due to the incompleteness of virus detoxification, high moisture content of mulberry leaves, high temperature and humidity of sericulture environment, steaming heat and sleep treatment, the mixed culture of healthy silkworm and diseased silkworm caused mutual infection.

2. Prevention and control methods. Before giving mulberry, the milky white and manic crawling diseased silkworms were extracted and buried deeply in a limed container, then wash their hands and disinfect the silkworm pedestal with fresh lime powder twice a day. Pay attention to mature mulberry leaves, do not eat tender leaves and immature leaves (the 2nd-3rd leaves of the first instar, the largest leaves of the second instar, the third eye leaves, and the full bud leaves of the fourth instar), and pay attention to indoor ventilation. 1 there should be air convection windows in the silkworm room during the second instar sleep, indoor air should be ventilated in the 3rd instar and 4th instar, and doors and windows should be opened in the 5th instar. If you encounter wet mulberry leaves on rainy days, you should pay more attention to opening doors and windows to raise silkworms.

2. Stiff disease

The conidia of stiff disease (white hair) are brought in by the wind and mulberry leaves, and after falling on the silkworm body, they are drilled into the silkworm body for 12 hours to absorb the nutrition and water of the silkworm body to maintain life. After a day, the silkworm body is drilled out to produce hyphae and conidia, and then transmitted to the healthy silkworm through conidia.

1. The cause of the disease. The presence of conidia and high humidity in the air are conducive to the growth of conidia, which are easy to occur in rainy spring, summer and late autumn.

2. Prevention and control methods. Timely elimination of diseased silkworms should be mastered before the bodies of diseased silkworms are white, so as to prevent infection, and the diseased silkworms caught should be burned or buried deeply, and late-sleeping silkworms and sleepless silkworms should be eliminated in time in rearing. At the same time, it is necessary to do a good job in disinfecting the silkworm body during the susceptible period of ant silkworm, mature silkworm, and so on.

Prevention and treatment of mild disease: in addition to ant silkworm, silkworm, routine silkworm pedestal disinfection, five-year-old silkworm body silkworm pedestal disinfection, sleep more coke bran lime to keep silkworm pedestal dry.

Prevention and treatment of serious disease: in addition to routine silkworm pedestal disinfection of ant silkworm, Qi silkworm and mature silkworm, five-year-old silkworm should also adhere to the disinfection of silkworm body twice a day, and the pressure in sleep should be changed from lime to anti-stiff powder.

The special drugs for the prevention and treatment of stiff diseases are: "Miejianling" anti-stiff powder, "Youchujing" anti-stiff powder, antibacterial agent "402", can also be fumigated with "Xunxiaojing", and the big silkworm period can also be sprayed with 200 times liquid.