Probing behaviour of Cacopsylla pyri on a resistant pear selection

摘要: European pear psylla Cacopsylla pyri L. (Hemiptera Psyllidae) is one of the worst pests (Pyrus communis L.) in Europe. We investigated probing behaviour adults and nymphs C. by full EPG on a psylla-resistant selection, NY 10353. Concerning stylet plant surface, results showed no significant differences between resistant selection susceptible cultivar Bartlett, were also detected for epidermis mesophyll resistance same conditions. For mesophyll/phloem, found adults. However, nymphs, weak factors (longer penetration salivation) selection. In phloem, data indicate strong 10353, especially summer-form time before first phloem ingestion lower duration each event). No prolonged (>10 min) was performed The support hypothesis that 10353 are located sap cause high nymph mortality: this could be useful as basis further investigations mechanisms at metabolic, chemical genetic levels.