Abstract
A densovirus, named Periplaneta fuliginosa densovirus (PfDNV), affects smoky-brown cockroach ( P. fuliginosa), which is a major peridomestic cockroach in China, southeastern United States, Japan, and Southeast Asia. We reported here that PfDNV could be mass-produced using virus rescue technology. Pathology and ultrastructural studies revealed the presence of enlarged and dense nuclei in hindgut cells of infected smoky-brown cockroach nymphs and adults. Laboratory bioassays of the PfDNV against P. fuliginosa showed that it has the potential to be used as a biocontrol agent. High mortality was recorded in adult smoky-brown cockroaches treated with PfDNV baits at the dosage of 6 × 10 4 virions per gram against P. fuliginosa in both no-choice tests and two-choice tests (LT 50’s were 13.37 and 13.50 days, respectively). PfDNV was also effective in large population chamber tests. LT 50 was 17.57 days and mortality achieved was 95.6% in 28 observation days.
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