Effect of Host Phenology on Ovipositional Preference of Winter form Pear Psylla (Homoptera: Psyllidae)

L. C. Stuart, B. A. Butti, R. L. Bell

Abstract


In free-choice assays using budwood at similar stages of leaf emergence, winter form (WF) pear psylla (Cacopsylla pyricola Foerster form simulans) showed no ovipositional preference for psylla-susceptible 'Bartlett' (Pyrus communis L.) over psyllaresistant W6 (P. ussuriensis Maxim.) or NY10353 (P. ussuriensis x P. communis (hybrid). After budbreak, WF psylla oviposited on the host with foliage in the most advanced stage of leaf emergence.


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