Proceedings of the Entomological Society of Washington (2001) 103, 103-109

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A.G. Wheeler Jr. and Craig A. Stoops (2001)
Cacopsylla peregrina (Foerster) (Sternorrhyncha: Psylloidea: Psyllidae): First U.S. records of an old world specialist on hawthorns (Crataegus spp.)
Proceedings of the Entomological Society of Washington 103 (1), 103-109
Abstract: Known previously from British Columbia, Canada, the Palearctic Cacopsylla peregrina (Foerster) is reported from California, Oregon, and Washington as the first U.S. records for this psyllid. Detected in 1999 in Washington on English hawthorn (Crataegus monogyna Jacq.), which has been introduced and planted as an ornamental in North America, C. peregrina is thought to have been accidentally introduced with hawthorn nursery stock from Europe. A brief taxonomic description of the adult and this psyllid's Old World distribution and bionomics are provided.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Alfred G. Wheeler

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution
surveys/sampling/distribution


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Cacopsylla peregrina U.S.A. (SW)
Cacopsylla peregrina Canada (west)
Cacopsylla peregrina Hawthorn (Crataegus) U.S.A. (NW)