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ASSOCIATION BETWEEN A SUNFLOWER FUNGAL PATHOGEN, PHOMA MACDONALDII, AND A STEM WEEVIL, APION OCCIDENTALE (COLEOPTERA: CURCULIONIDAE)1

Published online by Cambridge University Press:  31 May 2012

M. D. Gaudet  and
J. T. Schulz
M. D. Gaudet
Affiliation:
Department of Entomology, North Dakota State University, Fargo 58105
J. T. Schulz
Affiliation:
Department of Entomology, North Dakota State University, Fargo 58105
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Abstract

The presence of the fungus Phoma macdonaldii Boerema on the exocuticle of the adult stem weevil Apion occidentale Fall, was verified using isolation techniques and scanning electron microscopy. Pycnidiospores matching those of P. macdonaldii in size and shape were observed on the antennae, meso- and metathoracic legs of both field-collected and Phoma-incubated adults. Fungal hyphae were observed on the rostrum of both field-collected and laboratory-inoculated adults. Four percent of the weevils carried P. macdonaldii internally.

Résumé

La présence du champignon Phoma macdonaldii Boerema sur l'exocuticule du charançon Apion occidentale Fall a été vérifiée par isolation et microscopie électronique à balayage. Des pycnidiospores correspondant à celles du P. macdonaldii par la taille et la forme ont été observées sur les antennes et les pattes méso- et métathoraciques d'adultes provenant du terrain ou incubés avec le Phoma. Des hyphes fongiques ont été observées sur le rostre d'adultes provenant du terrain ou inoculés au laboratoire. Quatre pourcent des charançons ont été trouvés portant intérieurement le P. macdonaldii.

Type
Articles
Information
The Canadian Entomologist , Volume 116 , Issue 9 , September 1984 , pp. 1267 - 1273
Copyright
Copyright © Entomological Society of Canada 1984

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