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    Description

    Oak bark beetles, Pseudopityophthorus minutissimus and P. pruinosus, are considered important vectors of the oak wilt fungus, Ceratocystis fagacearum, in Missouri and Ohio. However, the frequency of the species' association with diseased oaks in Minnesota and their relative importance in pathogen spread in the state are unclear. Window traps were placed in canopies of recently killed northern pin oaks to determine seasonal flight periodicities of dispersing oak bark beetles and their phoresy (pathogen presence) rates. Branch samples were collected from diseased northern pin and northern red oak canopies in May and Aug., life history data obtained, and oak bark beetles emerging from the branches assayed for the pathogen. Only P. minutissimus was found in the study areas.

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    Citation

    Ambourn, Angie K.; Juzwik, Jennifer; Eggers, Jordan E. 2006. Flight periodicities, phoresy rates, and levels of Pseudopityophthorus minutissimus branch colonization in oak wilt centers. Forest Science. 52(3): 243-250.

    Keywords

    oak bark beetles, Quercus ellipsoidalis, Quercus rubra, Ceratocystis fagacearum

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