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Pear Psylla

Wednesday Mar 10, 2021

Pear psylla adult on pear limb
Pear psylla eggs
Pear psylla hard shell

Pear Psylla (Cacopsylla pyri) 

Why is it a problem?
Pear psylla is a common pest in pear orchards in North America. Due to its ability to develop resistance to a variety of pesticides, pear psylla continues to be a problem insect in pear orchards throughout the Okanagan Valley. Actual damage caused by pear psylla can either be to the feeding habits of the insect itself, or due to pear decline disease, which uses pear psylla as a vector. As the pear psylla nymphs feed, honeydew is released and can fall onto neighbouring fruit, causing black sooty mold and russetting to develop and blemish the developing fruit. Since pear psylla have both systemic and topical damaging effect, control of this pest should be a concern for growers, as either can greatly limit the amount of return from the packinghouse to the grower.    
Where does pear psylla come from?
Pear psylla overwinter in the orchard, and effective control measured should be aimed at controlling their populations during the dormant season before they become active in the spring.  
Still interested in finding out more? Check out our BC DAS Pear Psylla video on YouTube to connect horticultural knowledge from the field with the online DAS program: