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

Studies in Fungi 2019年第1期4卷 123-134页

作者： dobrotka cj Krieger M Oakley M Trotter J Rodell BM Stein KL Klever LA Fisher KA Yoder JA Department of Biology Wittenberg UniversitySpringfieldOH45501USA Champagne and Aishihik First Nations Haines JunctionYTY0B 1L0CAN Oakley Veterinary Services HainesAK99827USA

Fungal composition of Yukon soil samples consisted of 29 soil saprobes common to acidified forest,subarctic *** 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 ***,Mucor,Paecilomyces yielded>~70%larval mortality and the remainder,mostly Mortierella and Penicillium,averaged~40%larval *** where elk(Cervus elaphus canadensis)are observed had an overall greater quantity,and diversity of entomopathogenic soil fungi than sites where elk are not *** 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 *** conclude that Yukon soils contain fungi that naturally regulate populations of *** fungi are archived at the Wittenberg University Fungus Collection,Springfield,OH,USA.

关键词： Biological control mycoflora moose tick elk tick horse tick Canada Alaska

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Temperature-water and competitive interactions in vitro of two toxic black molds,Fusarium oxysporum and Rhizopus stolonifer isolated from a shower setting

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Studies in Fungi 2018年第1期3卷 248-255页

作者： Yoder JA Klever LA dobrotka cj Department of Biology Wittenberg UniversitySpringfieldOH45504USA

We report differences in secondary resource capture and upper lethal temperature as survival attributes for Fusarium oxysporum(FOSC)and Rhizopus stolonifer,two medically important fungi that were co-isolated from a table shower *** of these two shower-associated fungi have been deposited at the University of Alberta Microfungus Collection and Herbarium,Centre for Global Microfungal Biodiversity(UAMH,Toronto,CAN)as *** UAMH 11965 and ***(FOSC)UAMH 11966;this paper provides growth characteristics for these two strains that can be used for further studies on black molds in bathrooms given the relevance to public *** *** UAMH 11965 and ***(FOSC)UAMH 11966 require contact with a wet surface substrate with water activity≥0.95 aw for growth and *** contrast to ***,*** has a 4-6x,faster radial growth rate,superior colonizing ability,and capacity for overgrowth(exploitative competition).This ***(FOSC)strain,however,is thermotolerant,as demonstrated by broader thermal growth range and higher optimum temperature,which puts fewer limitations on its growth compared to *** is a point of public awareness for mold-sensitive and immunocompromised people that wet,wood substrates in a shower can permit colonization and competitive interactions that can concentrate *** and *** spores.

关键词： Bathroom fungal ecology public health radial growth resource capture

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