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Host choice and host leaving in Rhopalosiphum padi (Hemiptera: Aphididae) emigrants and repellency of aphid colonies on the winter host

Glinwood, Robert and Petersson, J. (2000). Host choice and host leaving in Rhopalosiphum padi (Hemiptera: Aphididae) emigrants and repellency of aphid colonies on the winter host. Bulletin of entomological research. 90, 57-61
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Official URL: http://dx.doi.org/10.1017/S0007485300000717

Abstract

Host choice and winter-host leaving in emigrants of bird cherry–oat aphid,
Rhopalosiphum padi (Linnaeus), were investigated in the laboratory. In settling
choice tests, emigrants collected from the winter host, Prunus padus, preferred this
plant over a summer host, oats. Emigrants which had left P. padus for up to 24 h
did not express a preference as a group, and those which had left for 24–48 h
preferred oats. Eighty seven percent of emigrants caged as fourth-instar nymphs
on P. padus leaves abandoned the host by the second day of adult life, and
apparently did not subsequently return to the leaf. In an olfactometer, P. padus
leaves which had supported spring generations of R. padi were repellent to
emigrants. Volatiles were entrained from uninfested and R. padi-infested P. padus
using cut twigs in the laboratory as well as intact twigs on a tree in the field.
Entrainment extracts from uninfested P. padus had no effect on emigrants in the
olfactometer, whereas those from twigs infested with nymphal emigrants were
repellent. The study indicates that in R. padi, host-alternation is driven by
behavioural changes which occur in individuals as well as between morphs.

Authors/Creators:Glinwood, Robert and Petersson, J.
Title:Host choice and host leaving in Rhopalosiphum padi (Hemiptera: Aphididae) emigrants and repellency of aphid colonies on the winter host
Series/Journal:Bulletin of entomological research (0007-4853)
Year of publishing :2000
Volume:90
Page range:57-61
Publisher:Cambridge Journals
ISSN:0007-4853
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Agris subject categories.:H Protection of plants and stored products > H10 Pests of plants
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:aphid, host plant, signal
URN:NBN:urn:nbn:se:slu:epsilon-e-805
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-805
ID Code:9310
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
External funders:MISTRA
Deposited By: Dr Robert Glinwood
Deposited On:19 Dec 2012 12:14
Metadata Last Modified:02 Dec 2014 10:53

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