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The relative abundance of the hymenopterous parasites attacking Metopolophium dirhodum (Walker) and Sitobion avenae (F.) (Hemiptera: Aphididae) on cereals during 1973–79 in southern England

Published online by Cambridge University Press:  10 July 2009

G. J. Dean
Affiliation:
Rothamsted Experimental Station, Harpenden, Hertfordshire, UK
Margaret G. Jones
Affiliation:
Rothamsted Experimental Station, Harpenden, Hertfordshire, UK
W. Powell
Affiliation:
Rothamsted Experimental Station, Harpenden, Hertfordshire, UK

Abstract

In studies in southern England, the relative abundance of the hymenopterous parasites attacking Metopolophium dirhodum (Wlk.) and Sitobion avenae (F.) differed between their hosts, between years (1973–79) and on whether they were assessed using field or laboratory-reared mummies. Species of the complex of Aphidius uzbekistanicus Luzhetzki were usually the commonest parasites, especially from mummies of M. dirhodum, while Aphidius picipes (Nees) was less common and tended to attack mainly S. avenae; Toxares deltiger (Hal.) was common only in 1979. Species of hyperparasites emerged most frequently from mummies of M. dirhodum, except for Dendrocerus carpenteri (Curt.), which emerged most often from S. avenae.

Type
Original Articles
Copyright
Copyright © Cambridge University Press 1981

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