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2019 Volume 4
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ARTICLE   Open Access    

Entomopathogenic fungi isolated from Yukon soil against unfed larvae of the winter tick, Dermacentor albipictus

  • 1.

    Department of Biology, Wittenberg University, Springfield, OH, 45501, USA

  • 2.

    Champagne and Aishihik First Nations, Haines Junction, YT, Y0B 1L0, CAN

  • 3.

    Oakley Veterinary Services, Haines, AK, 99827, USA

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  • Fungal composition of Yukon soil samples consisted of 29 soil saprobes common to acidified forest, subarctic habitats. All of the fungi identified are psychrotrophs, capable of growth at both 4℃ and 20℃. Of these, a total of 17 fungi were found to be entomopathogenic by winter tick (Dermacentor albipictus) larval bioassays: Aspergillus flavus, Beauveria, namely B. bassiana, Mucor, Paecilomyces yielded > ~ 70% larval mortality and the remainder, mostly Mortierella and Penicillium, averaged ~ 40% larval mortality. Sites where elk (Cervus elaphus canadensis) are observed had an overall greater quantity, and diversity of entomopathogenic soil fungi than sites where elk are not observed. Greater diversity of fungi at elk-inhabited sites is likely a product of warmer soil microclimate (hillsides where elk are seen, lose snow earlier than other areas), animal presence, and increased nutrient enrichment. We conclude that Yukon soils contain fungi that naturally regulate populations of D. albipictus. All fungi are archived at the Wittenberg University Fungus Collection, Springfield, OH, USA.
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    CJ Dobrotka, M Krieger, M Oakley, J Trotter, BM Rodell, KL Stein, LA Klever, KA Fisher, JA Yoder. 2019. Entomopathogenic fungi isolated from Yukon soil against unfed larvae of the winter tick, Dermacentor albipictus. Studies in Fungi 4(1):123−134 doi: 10.5943/sif/4/1/15
    CJ Dobrotka, M Krieger, M Oakley, J Trotter, BM Rodell, KL Stein, LA Klever, KA Fisher, JA Yoder. 2019. Entomopathogenic fungi isolated from Yukon soil against unfed larvae of the winter tick, Dermacentor albipictus. Studies in Fungi 4(1):123−134 doi: 10.5943/sif/4/1/15
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ARTICLE   Open Access    

Entomopathogenic fungi isolated from Yukon soil against unfed larvae of the winter tick, Dermacentor albipictus

  • 1.

    Department of Biology, Wittenberg University, Springfield, OH, 45501, USA

  • 2.

    Champagne and Aishihik First Nations, Haines Junction, YT, Y0B 1L0, CAN

  • 3.

    Oakley Veterinary Services, Haines, AK, 99827, USA

  • Received: 11 April 2019
  • Revised: 09 July 2019
  • Published online: 21 July 2019
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Studies in Fungi  4,  Article number: 15  (2019)  |  Cite this article

Abstract: Fungal composition of Yukon soil samples consisted of 29 soil saprobes common to acidified forest, subarctic habitats. All of the fungi identified are psychrotrophs, capable of growth at both 4℃ and 20℃. Of these, a total of 17 fungi were found to be entomopathogenic by winter tick (Dermacentor albipictus) larval bioassays: Aspergillus flavus, Beauveria, namely B. bassiana, Mucor, Paecilomyces yielded > ~ 70% larval mortality and the remainder, mostly Mortierella and Penicillium, averaged ~ 40% larval mortality. Sites where elk (Cervus elaphus canadensis) are observed had an overall greater quantity, and diversity of entomopathogenic soil fungi than sites where elk are not observed. Greater diversity of fungi at elk-inhabited sites is likely a product of warmer soil microclimate (hillsides where elk are seen, lose snow earlier than other areas), animal presence, and increased nutrient enrichment. We conclude that Yukon soils contain fungi that naturally regulate populations of D. albipictus. All fungi are archived at the Wittenberg University Fungus Collection, Springfield, OH, USA.

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    CJ Dobrotka, M Krieger, M Oakley, J Trotter, BM Rodell, KL Stein, LA Klever, KA Fisher, JA Yoder. 2019. Entomopathogenic fungi isolated from Yukon soil against unfed larvae of the winter tick, Dermacentor albipictus. Studies in Fungi 4(1):123−134 doi: 10.5943/sif/4/1/15
    CJ Dobrotka, M Krieger, M Oakley, J Trotter, BM Rodell, KL Stein, LA Klever, KA Fisher, JA Yoder. 2019. Entomopathogenic fungi isolated from Yukon soil against unfed larvae of the winter tick, Dermacentor albipictus. Studies in Fungi 4(1):123−134 doi: 10.5943/sif/4/1/15
    shu

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