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DIFFERENCE IN THE TRANSMISSION OF PVY° TO POTATO AND TOBACCO BY THE POTATO APHID, MACROSIPHUM EUPHORBIAE (THOMAS): EFFECTS OF PROBING DURATION AND FREQUENCY

Published online by Cambridge University Press:  31 May 2012

Gilles Boiteau  and
R.P. Singh
Gilles Boiteau
Affiliation:
Agriculture Canada Research Station, PO Box 20280, Fredericton, New Brunswick, Canada E3B 4Z7
R.P. Singh
Affiliation:
Agriculture Canada Research Station, PO Box 20280, Fredericton, New Brunswick, Canada E3B 4Z7
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Abstract

The probing behavior of the potato aphid, Macrosiphum euphorbiae (Thomas), is significantly different on potato than on tobacco plants. The higher frequency of short-duration probes, ideal for the transmission of nonpersistent viruses, is the apparent cause for the higher rate of potato virus Y° (PVY°) transmission on tobacco than on potato. However, experimental augmentation of short inoculation probes by M. euphorbiae on potato and tobacco failed to increase PVY° transmission on either. These results demonstrate the absence of a causal relationship between variations in probing behavior of M. euphorbiae and variations in the transmissibility of PVY° by this vector on tobacco and potato.

Résumé

Le comportement de piqûre du puceron de la pomme de terre, Macrosiphum euphorbiae (Thomas), est significativement différent sur plants de pomme de terre et de tabac. Les piqûres de courte durée, idéale pour la transmission des virus non persistants, sont plus fréquentes sur les tabac que sur la pomme de terre. Ces piqûres constituent la cause apparente des taux plus élevés de transmission du virus de la pomme de terre Y° (PVY°) sur tabac que sur pomme de terre. Cependant, l’augmentation expérimentale des piqûres de transmission par M. euphorbiae sur pomme de terre et sur tabac n’a pas réussi à changer le taux de transmission sur une espèce ou l’autre de plantes. Ces résultats demontrent l’absence d’une relation causale entre les variations dans le comportement de piqûre de M. euphorbiae et les variations dans la transmissibilité du PVY° par ce vecteur sur tabac ou pomme de terre.

Type
Articles
Information
The Canadian Entomologist , Volume 123 , Issue 4 , August 1991 , pp. 869 - 874
Copyright
Copyright © Entomological Society of Canada 1991

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