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

作　　者：Dobrotka CJ Krieger M Oakley M Trotter J Rodell BM Stein KL Klever LA Fisher KA Yoder JA 

机构地区：[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

出　　处：《Studies in Fungi》2019年第1期123-134,共12页真菌研究（英文）

摘　　要：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.

关 键 词：Biological control MYCOFLORA moose tick elk tick horse tick Canada Alaska 

分 类 号：S15[农业科学—土壤学]