The reason why silkworms do not cocoon

1. Pathological factors. For example, purulence and malacia are easy to be infected before the upper cluster, which destroys the secretory function of the silk gland of the silkworm, or the pathogen produces a large number of toxic metabolites in the silkworm, which paralyzes the nerves of the silkworm and cannot spin cocoons.

2. Physiological factors. The first is the abnormality of the central silk gland, mainly because the feeding temperature is too high or too low, the leaf quality is too tender, the secretory gland is maladjusted, and the silk gland is abnormal, and the second is the abnormality of the anterior silk gland. it is mainly caused by excessive exposure to bad gases such as gas, fishy gas and alcohol in the process of feeding.

3. Trace pesticide poisoning. During the period of feeding or clustering, ingestion or contact with trace pesticides caused the imbalance of endocrine glands in the silkworm body, but could not spin silk.

4. Improper operation of the upper cluster. The extensive operation of the upper cluster leads to the rupture of the silk gland, or the temperature in the cluster is too low, the cluster is not clean, the upper cluster is too dense, the upper cluster environment is poor, and other reasons make the silkworm stop spinning for a long time without cocooning.