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BIOLOGY AND REARING OF PARAPHLEPSIUS IRRORATUS (HOMOPTERA: CICADELLIDAE), A VECTOR OF PEACH X-DISEASE1

Published online by Cambridge University Press:  31 May 2012

L.N. Chiykowski
Affiliation:
Chemistry and Biology Research Institute, Agriculture Canada, Ottawa, Ontario K1A 0C6

Abstract

A method of rearing Paraphlepsius irroratus (Say) under artificial conditions was developed by using a leguminous plant species as the oviposition host and a gramineous species as the food plant for nymphs. Nymphs completed their development on all 10 gramineous species tested. Total time for completion of the 5 nymphal instars ranged from 31.8 to 59.2 days, depending on the plant species used. With the exception of Alopecurus pratensis, all monocotyledonous species tested were found to be suitable food plants for nymphs, allowing 50% or more of the insects to survive for 3 weeks or more. Only 5 dicotyledonous species supported a similar survival level of nymphs. Adult survival remained above the 50% level on Apium graveolans var. dulce, 6 members of the Leguminosae, and all members of Composite with the exception of Callistephus chinensis. Survival of adult leafhoppers on monocotyledons was relatively high after 1 week but considerable mortality followed longer confinement. Although nymphs emerged from eggs laid on a wide range of plant species, the numbers recorded on monocotyledons suggest that monocots are important as oviposition hosts for P. irroratus in nature.

Résumé

Un mode d'élevage artificiel de Paraphlepsius irroratus (Say) a été mis au point en utilisant une légumineuse comme plante hôte d'oviposition et une graminée comme plante fourrage pour les nymphes. Celles-ci ont complété leur développement sur les 10 espèces de graminées testées. Le laps de temps nécessaire pour terminer les 5 stades nymphaux varie de 31,8 à 59,2 jours selon l'espèce végétale utilisée. À l'exception de Alopecurus pratensis, toutes les espèces monocotylédones s'avèrent des plantes four-rages convenables pour les nymphes, permettant à au moins 50% des insectes de survivre 3 semaines ou plus. Seules 5 espèces dicotylédones affichent un taux de survie comparable. La survie des adultes demeure supérieure à 50% sur Apium graveolens var. dulce, 6 représentants des Légumineuses et tous les membres des Composées, sauf Callistephus chinensis. La survie des adultes sur monocotylédones est relativement meilleure au bout de 1 semaine, mais un séjour plus prolongé entraîne une forte mortalité. Bien que des nymphes émergent des oeufs déposés sur toute une gamme d'espèces végétales, le nombre enregistré sur monocotylédones donne à penser que celles-ci sont des hôtes d'oviposition importants pour P. irroratus dans la nature.

Type
Articles
Copyright
Copyright © Entomological Society of Canada 1985

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