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Feeding behaviour of the aphid Rhopalosiphum padi (Hemiptera: Aphididae) on nitrogen and water-stressed barley (Hordeum vulgare) seedlings

Published online by Cambridge University Press:  09 March 2007

K.L. Ponder ,
J. Pritchard ,
R. Harrington  and
J.S. Bale
K.L. Ponder*
Affiliation:
School of Biosciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
J. Pritchard
Affiliation:
School of Biosciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
R. Harrington
Affiliation:
Department of Entomology and Nematology, IACR-Rothamsted, Harpenden, Herts, AL5 2JQ, UK
J.S. Bale
Affiliation:
School of Biosciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
*
*Fax: 0121 414 5925 E-mail: k.l.ponder@bham.ac.uk
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Abstract

Electrical penetration graphs (EPGs) were used to examine the probing behaviour of adult apterous Rhopalosiphum padi (Linnaeus) on barley seedlings grown under conditions of nitrogen or water stress. Aphids took significantly longer to reach and ingest from sieve elements of nitrogen-deficient seedlings than from nitrogen-sufficient seedlings but there were no such differences between water-stressed or well-watered seedlings. On both nitrogen and water-stressed seedlings the average length of each individual period of salivation into the sieve element was significantly greater compared with their respective unstressed controls.

Type
Research Article
Information
Bulletin of Entomological Research , Volume 91 , Issue 2 , April 2001 , pp. 125 - 130
Copyright
Copyright © Cambridge University Press 2001

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