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Infection with an insect virus affects olfactory behaviour and interactions with host plant and natural enemies in an aphid
Södertörns högskola, Institutionen för livsvetenskaper.
Vise andre og tillknytning
2008 (engelsk)Inngår i: Entomologia Experimentalis et Applicata, ISSN 0013-8703, E-ISSN 1570-7458, Vol. 127, nr 2, s. 108-117Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Aphid ecology and population dynamics are affected by a series of factors including behavioural responses to ecologically relevant chemical cues, capacity for population growth, and interactions with host plants and natural enemies. Using the aphid Rhopalosiphum padi (L.) (Homoptera: Aphididae), we showed that these factors were affected by infection with Rhopalosiphum padi virus (RhPV). Uninfected aphids were attracted to odour of uninfected aphids on the host plant, an aggregation mechanism. However, infected aphids were not attracted, and neither infected nor uninfected aphids were attracted to infected aphids on the plant. Infected aphids did not respond to methyl salicylate, a cue denoting host suitability. Infected aphids were more behaviourally sensitive to aphid alarm pheromone, and left the host plant more readily in response to it. RhPV reduced the lifespan and population growth rate of the aphid. The predacious ladybird, Coccinella septempunctata (L.) (Coleoptera: Coccinellidae), consumed more infected aphids than uninfected aphids in a 24-h period, and the aphid parasitoid Aphidius ervi Haliday (Hymenoptera: Aphidiidae) attacked more infected than uninfected aphids. However, the proportion of mummies formed was lower with infected aphids. The results represent further evidence that associated organisms can affect the behaviour and ecology of their aphid hosts.

sted, utgiver, år, opplag, sider
2008. Vol. 127, nr 2, s. 108-117
HSV kategori
Identifikatorer
URN: urn:nbn:se:sh:diva-14158DOI: 10.1111/j.1570-7458.2008.00675.xISI: 000255060200004Scopus ID: 2-s2.0-42449153871OAI: oai:DiVA.org:sh-14158DiVA, id: diva2:467018
Tilgjengelig fra: 2011-12-18 Laget: 2011-12-16 Sist oppdatert: 2017-12-08bibliografisk kontrollert

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