A Bibliography on the Pear Psylla, Psylla pyricola (Homoptera: Psyllidae)

Author： Chang Juan F. Philogène Bernard J. R.

Publisher： Entomological Society of America

ISSN： 0013-8754

Source： Entomological Society of America. Bulletin, Vol.21, Iss.4, 1975-12, pp. : 247-249

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Abstract

The pear psylla, Psylla pyricola Foerster is regarded as the most injurious pest of pear trees in North America. It is also known as the pear sucker or jumping louse. The insect is generally believed to be a: native of southern Europe and western Asia where its preferred host Pyrus communis L. is found. It was first reported in North America in 1832, probably introduced on pear stock brought from Europe to Massachusetts or Connecticut. It invaded the northeastern part of the continent fairly quickly, appearing in Ontario, Canada in 1894 and in Nova Scotia in 1916. There was no report on the occurrence of P. pyricola west of the Mississippi River until 1918 when it was found in Nelson, British Columbia. It was not before 1939 though, that the insect was discovered in the Spokane Valley of the State of Washington, gradually moving south and reaching California by 1953.