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DIFFERENTIAL IMPACT OF THE PATHOGEN PANDORA NEOAPHIDIS (R.&H.) HUMBER (ZYGOMYCETES: ENTOMOPHTHORALES) ON THE SPECIES COMPOSITION OF ACYRTHOSIPHON APHIDS IN ALFALFA

Published online by Cambridge University Press:  31 May 2012

J. Pickering  and
A.P. Gutierrez
J. Pickering
Affiliation:
Department of Entomology, University of Georgia, Athens, Georgia, USA 30602
A.P. Gutierrez
Affiliation:
Division of Biological Control, University of California, Berkeley, California, USA 94706
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Abstract

A fungal outbreak of Pandora neoaphidis (Remaudière and Hennebert) Humber (Zygomycetes, Entomophthorales, Entomophthoraceae) caused maximum daily mortality of 6 and 34%, respectively, in sympatric populations of Acyrthosiphon kondoi Shinji and Acyrthosiphon pisum Harris (Homoptera, Aphididae). This epidemic suppressed the A. pisum population but not the A. kondoi population. The results suggest that low level infections in A. kondoi may greatly increase the inoculum available for transmission to the highly susceptible A. pisum.

Résumé

Une manifestation fongique de Pandora neoaphidis (Remaudière et Hennebert) Humber (Zygomycètes, Entomophthorales, Entomophthoraceae) a occasionné une mortalité de 6 et de 34%, respectivement, aux populations sympatriques d’Acyrthosiphon kondoi Shinji et d’Acyrthosiphon pisum Harris (Homoptera, Aphididae). Cette épidémie a supprimé la population d’A. pisum, mais non celle d’A. kondoi. Les résultats permettent à supposer que les infections à bas niveau chez A. kondoi pourraient augmenter l’inoculum disponible à transmettre à A. pisum, fortement prédisposé à cette maladie.

Type
Articles
Information
The Canadian Entomologist , Volume 123 , Issue 2 , April 1991 , pp. 315 - 320
Copyright
Copyright © Entomological Society of Canada 1991

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