Cacopsylla pyricola (Foerster) (Hemiptera: Psyllidae)

Updated by Louis Nottingham, Robert Orpet, WSU Entomology; Tianna DuPont, WSU Extension. May 2022. Adapted from by Everett C. Burts, Helmut Riedl, and John Dunley, originally published 1993.

Pear psylla is an important pest of pear in Washington. Honeydew produced by pear psylla causes fruit russet, and serious infestations can stunt and defoliate trees. This updated informational flyer discusses the history of pear psylla in the United States and describes the life stages, life history, and damage psylla can cause to fruit and trees. Monitoring techniques, biocontrol agents, cultural tactics and chemical tactics are also presented.

Click the picture below to download the flyer as a PDF, or visit the Pear Psylla Page in the Orchard Pest Management section of the WSU Tree Fruit website.  The website version also includes specific spray timings for pyslla from the WSU Crop Protection Guide.

screenshot of the first page of the pear psylla integrated pest management handout with the some pictures of adult, nymph and egg stages of pear psylla.