Abstract
Entomophthora brevinucleata, a fungal pathogen of gall midges, is described. The species occurs on at least 3 host species, including the wheat blossom midgeSitodiplosis mosellana Géhin andMycodiplosis sp.E. brevinucleata produces rhizoids, either monohyphal or comprising bundles of a few hyphae, without holdfasts. The hyphal bodies are subspherical with mean dimensions of 27.5×22.1 μm. The primary conidia are campanulate with mean dimensions from individual hosts of 11.2–18.9×8.7–15.8 μm. They contain 3–13 nuclei with a mean diameter of between 2.7 and 3.7 μm stained with lactophenol-aceto-orcein. The secondary conidia are of similar shape but smaller. Cystidia and resting spores were not observed.
Résumé
Entomophthora brevinucleata, champignon pathogène de Cecidomyies est décrit. L'espèce se rencontre au moins sur 3 espèces-hôtes, parmi lesquelles la Cecidomyie du blé:Sitodiplosis mosellana Géhin etMycodiplosis sp.E. brevinucleata produit des rhizoides constitués d'un seul hyphe ou d'un faisceau de quelques hyphes, sans disques adhésifs. Les corps des hyphes sont subsphériques avec des dimensions moyennes de 27,5×22,1 μm. Les conidies primaires sont campanulées avec comme dimensions moyennes, selon les hôtes 11,2–18,9×8,7–15,8 μm. Elles contiennent de 3 à 13 noyaux dont le diamètre moyen est compris entre 2,7 et 3,7 μm colorées au lactophénol orcéine acétique. Les conidies secondaires sont de taille semblable mais plus petites. Des cystides et des spores durables ne furent pas observées
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References
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While this paper was in press. Ben-Ze'ev & Zelig (Mycotaxon 21, 463–474, 1984) described a similar fungus under the nameEntomophthora israelensis. Their data suggest an eventual identity of the 2 fungi but are unsufficient to allow a full comparison with ours. If the 2 descriptions are found to refer to the same fungus, then the binomialE. israelensis has priority andE. brevinucleata will be invalid.
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Keller, S., Wilding, N. Entomophthora brevinucleata sp. nov. [Zygomycetes, Entomophthoraceae], a pathogen of gall midges [Dip.: Cecidomyiidae]. Entomophaga 30, 55–63 (1985). https://doi.org/10.1007/BF02372283
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DOI: https://doi.org/10.1007/BF02372283