Occurrence of Microsporidium sp. and other pathogens in Ips amitinus (Coleoptera: Curculionidae)

Jaroslav Holuša; Karolina Lukášová; Zdenek Žižka; Uwe Händel; Bernhard Haidler; Rudolf Wegensteiner

doi:10.1515/ap-2016-0083

Article

Occurrence of Microsporidium sp. and other pathogens in Ips amitinus (Coleoptera: Curculionidae)

Jaroslav Holuša , Karolina Lukášová , Zdenek Žižka , Uwe Händel , Bernhard Haidler and Rudolf Wegensteiner

Published/Copyright: July 21, 2016

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From the journal Acta Parasitologica Volume 61 Issue 3

Abstract

A new microsporidium is reported from the small spruce bark beetle, Ips amitinus: Microsporidium sp. with uninucleate oval spores measuring 3.5 × 2.5 μm; infecting cells of the midgut epithelium, midgut muscles, the fat body, the Malpighian tubules, and the gonads of adult beetles collected in Austria. Seven other pathogens were found in beetles collected from Austria, the Czech Republic, and Finland. Six of them were already known from I. amitinus. Nosema cf. typographi is recorded for the first time in the overwintering generation of I. amitinus from the Czech Republic.

Keywords: Small spruce bark beetle; Scolytinae; microsporidia; protozoa; fungi; virus

Acknowledgements

We thank the Austrian Federal Forest Company (ÖBf), the Tyrolean federal state forest protection officer Dipl. Ing. Christian Schwaninger (Tyrol, Austria), and Prof. Dr. Kari Heliövaara (University of Helsinki) for providing bark beetle-infested log sections. This research was supported by project B05/16 from the Internal Grant Agency of Czech University of Life Sciences Prague, Faculty of Forestry and Wood Sciences, and by project from Ministry of Education, Youth and Sport of the Czech Republic (LO 1509) and EU (Operational Program Prague – Competitiveness project, CZ.2.16/3.1.00/24023). The authors thank Dr. Bruce Jaffee (USA) for linguistic and editorial improvements.

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Received: 2015-12-30

Revised: 2016-4-15

Accepted: 2016-4-29

Published Online: 2016-7-21

Published in Print: 2016-9-1

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https://doi.org/10.1515/ap-2016-0083

Keywords for this article

Small spruce bark beetle; Scolytinae; microsporidia; protozoa; fungi; virus