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Abstract   Infectivity of polyhedra of  Spodoptera litura  multiple nucleopolyhedrovirus before and after passage through the gut of the predatory stink bug,  Eocanthecona furcellata  Wolff (Hemiptera: Pentatomidae) was compared through field bioassay studies. Three sets of  E. furcellata  were used for bioassays and these were allowed to feed on a single meal of five third instar Oriental leaf worm,  Spodoptera litura  (Fabricius) (Lepidoptera: Noctuidae), that were infected with polyhedra before passage, after passage, and healthy (control) larvae 1 day prior to the trial. The predators were subsequently released on cabbage plants that were infested with 100 healthy  S. litura  larvae. The median lethal dose (LD  50  ) and survival time (ST  50  ) values before and after passage through the gut were not significantly different. Additional mortality due to virus infection increased 13– 17% before and after treatments but within these treatments the mortality did not vary significantly. It was concluded that  E. furcellata  disseminated the virus through their feces into the ecosystem and infectivity of the SpltMNPV was not altered after passage through the gut of the predator.Abbreviations: NPV  , nucleopolyhedrovirus;  SpltMNPV  ,  Spodoptera litura  multiple nucleopolyhedrovirus;  PIBs  , polyhedral inclusion

journal of insect science

A comparison of infectivity between polyhedra of the Spodoptera litura multiple nucleopolyhedrovirus before and after passage through the gut of the stink bug, Eocanthecona furcellata