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桑蚕原蚕后期出现死蛹给养蚕业带来很大危害。作者对后期死蛹进行了细菌分离和病原性测定,并对致病菌种作了鉴定。试验结果证明后期死蛹主要原因是条件致病菌和蚕蛹生理因素共同作用的结果,其主要条件致病菌有芽孢杆菌,金黄色葡萄球菌和链球菌。蚕期饲喂和蛹期创伤两种感染途径都能引起桑蚕后期死蛹。对后期死蛹的防治,应采取综合防治方法。
The late emergence of silkworm silkworm sericulture to bring great harm to sericulture. The authors carried out the bacterial isolation and pathogenicity determination of the dead pupal at the later stage, and identified the pathogenic bacteria. The results of the experiment showed that the main causes of dead pupae in later period were the result of the interaction of pathogenic bacteria and silkworm pupa physiological factors. The main pathogenic bacteria were Bacillus, Staphylococcus aureus and Streptococcus. Silkworm feeding and pupal trauma both ways can lead to late death silkworm pupa. On the prevention and treatment of late dead pupae, we should take an integrated approach to prevention and treatment.