Under normal conditions, silkworms start to scab after being matured and metamorphosed in the pupa. However, silkworms, which are often mature but do not produce cocoons, are often found in production. The silkworms on these silkworms die a few days later, and some of them spit a small amount of silk and become naked, but they rarely emerge into moths. Causes (1) Silkworm disease damage: mainly microorganisms such as pyosis, softening disease, and micro-organisms multiply in silkworm body to seize nutrients, affect the growth of silkworms and the development of silk glands, or directly invade silk glands and destroy silk glands. Secretory function. (2) Traces of pesticide poisoning caused silkworm central nervous paralysis and silk laying dysfunction. (3) Poor environment: If the temperature is too high during feeding, the mulberry leaves are too tender, and gas and formaldehyde are exposed during the rearing to cause silk gland abnormalities. (4) Excessive movement on the clusters: the silkworms are mechanically damaged. Silk gland rupture, affecting silking, causing no occurrence of silkworms. Prevention and control measures (1) Strict disinfection and disease prevention: In addition to strict disinfection before silkworm, silkworm, and silkworm rearing, once silkworm disease occurs in breeding, the diseased silkworm must be isolated and eliminated to prevent the spread; Virus disease is sterilized with lime powder every day. , Bacterial disease added with chloramphenicol, zombie with anti-point powder silkworm body disinfection, fly maggot disease with "extinction of silkworm" spray silkworm body or add food. (2) Strictly prevent pesticides, tobacco leaves, and coal gas poisoning; trace poisoning can be detoxified with atropine, pralidoxime, and epinephrine injection 500 times. (3) Controlling the meteorological environment: The temperature of the small silkworm stage is controlled at around 27-28 OC. In the summer, the silkworm should be ventilated, ventilated, and drained; the silkworm stage should be thinned out (silkworm silkworms). The silkworm foil is thin, and the silkworm head is thinned.) The action on the cluster is light, and attention should be paid to the ventilation in the tufts, so that "three and three unbiased sides" can be achieved (cooked silkworms are evenly cooked and partial; On the cluster density is uniform, not dense; on the cluster light is uniform, not polarized), "three dry" (cluster room, cluster tool, environmental drying).
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