关键词: 黑胸大蠊, 浓核病毒, 死亡率

Abstract: Having found the Periplaneta fulginosa Densovirus in 1990, we made infection experiment with the virus according to Koch' s hypothesis. The results showed, when the virus separated from the periplaneta fulginosa, they could result in the same disease symptoms and we could separate a new all the same DNV from the dead Periplaneta fulgnosa. This illustrated the DNV was the pathogen of death of Periplaneta fulginosa. The back infection power of the virus was very strong, LT₅₀ was 39 days, the final percent of death reached to 99%. The virus was a pathogen of high toxicity for the Periplaneta fulginosa control. It'll supply us a new effective way and a best biological pesticide resource for the biological control of Periplaneta fulginosa. It is worth studying and development.