Pheromone traps for the dissemination of an entomopathogen by the damson-hop aphid Phorodon humuli

Hartfield, C. M., Campbell, C. A. M., Hardie, J., Pickett, J. A. ORCID: https://orcid.org/0000-0002-8386-3770 and Wadhams, L. 2001. Pheromone traps for the dissemination of an entomopathogen by the damson-hop aphid Phorodon humuli. Biocontrol Science and Technology 11 (3) , pp. 401-410. 10.1080/09583150120055817

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Abstract

Two types of sex pheromone-emitting trap, a simple louvred trap and a commercially-produced wasp trap (Waspy®) designed or modified as delivery systems for entomopathogens, were tested using an isolate of the pathogen Verticillium lecanii . Their efficiencies for capturing winged autumn females (gynoparae) and males of Phorodon humuli in a hop garden and a plum orchard were compared with each other and with catches by yellow-painted water traps. Gynoparae rarely entered either type of pathogen dissemination trap. Males only entered traps that released (1 R , S ,4a R , 7 S , 7a S )-nepetalactol, the sex pheromone of P. humuli . In the hop garden, approximately five times as many males entered the modified Waspy® as entered the louvred traps, whereas in the plum orchard similar numbers of males were caught in both traps. On average, males visited the modified Waspy® trap for 34.1 - 7.9 (SE) min. Males spent about 50% of their time in the arena where the entomopathogen would normally be present and a further 20% of the time on the inside of the arena lid alongside the pheromone source. Out of a sample of 16 live aphids removed from a trap dispensing V. lecanii , 9 died from infection by the pathogen and 5 of the 16 initiated colonies of the fungus after they walked on a sterile agar plate for five minutes. None of the 15 aphids collected from traps without V. lecanii became infected or initiated colonies of the fungus on agar plates.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Chemistry
Publisher:	Taylor and Francis Group
ISSN:	0958-3157
Last Modified:	05 Mar 2026 15:00
URI:	https://orca.cardiff.ac.uk/id/eprint/185522

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