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1. The interaction between coleopteran predators and baculovirus-infected larvae was studied in the laboratory and the field in arder to assess the potential role of predators in fue dissemination of a nucleopolyhedrovirus (NPV). 2. Preference tests using three carabid species, Harpalus rufipes De Geer, Pterostichus melanarius Illiger and Agonum dorsale Ponto showed no evidence of discrimination between healthy and diseased larvae of the cabbage moth Mamestra brassicae L. (Lepidoptera: Noctuidae) as prey items. 3. Virus infectivity was maintained after passage through the predator's gut. NPV mortality ranged from 97% to 20% when test larvae were exposed to faeces co)lected immediate)y after and 15 days post-infected mea) respectively. 4. The potential for transfer of inoculum in fue environment was estimat~d in the )aboratory by soi) bioassay. Carabids continuously passed infective virus to the soi) for at least ) 5 days after feeding on infected larvae. 5. Field experiments showed that carabids which had previously red on diseased larvae transterred sufficient virus to the soil to cause )ow leve)s of morta)ity in larva) populations of the cabbage moth at different instars. Inglés

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