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Pathogens of bark beetles (Curculionidae: Scolytinae) and other beetles in Bulgaria |
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| Authors: | Danail Ilchev Takov Danail Dimitrov Doychev Andreas Linde Slavimira Atanasova Draganova Daniela Kirilova Pilarska |
| Institution: | 1. Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, 1, Tsar Osvoboditel Blvd., Sofia, 1000, Bulgaria 2. University of Forestry, 10, Kl. Ohridski Blvd., Sofia, 1756, Bulgaria 3. University of Applied Sciences Eberswalde, Alfred-M?ller-Stra?e 1, 16225, Eberswalde, Germany 4. Institute of Soil Science, Agrotechnologies and Plant Protection, 7 Shosse Bankya Str., 1080, Sofia, Bulgaria 5. Faculty of Forestry and Wood Science, Czech University of Life Sciences, 129 Kamyck?? str, CZ-16521, Prague 6, Suchdol, Czech Republic |
| Abstract: | The presence and diversity of beetle pathogens associated with different tree species in Bulgaria was investigated. In total, 818 specimens belonging to 22 beetle species were examined. Pathogens occurred in 9 host species. The infections were found in the gut (virus, nematodes, protozoans, microsporidia) and haemolymph (nematodes) of the infected insects. The following pathogen species: ItEPV, Beauveria bassiana, B. brongniartii, Isaria farinosa, Gregarina typographi, Gregarina spp., Chytridiopsis typographi, Chytridiopsis sp., and nematodes were revealed. Insects with mycoses were mummified and filled up with fungal structures, formed pseudosclerotium. Most pathogens were established in bark beetles (Scolytinae). For the first time, the fungus B. bassiana was reported in Tomicus piniperda, Orthotomicus longicollis, O. erosus, X. spinole, Taphrorychus villifrons and Phylobius sp. in Bulgaria. We also present the first records of gregarines in O. longicollis, Acanthocinus aedilis, Rhagium inquisitor, Pyrochroa coccinea, and of the microsporidium Chytridiopsis sp. in O. longicollis. |
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