Thirteen pear species and cultivars evaluated for resistance to Cacopsylla pyri (Homoptera Psyllidae)

S. Berrada (1) , T.X. Nguyen (1) , J. Lemoine (1) , J. Vanpoucke (2) , D. Fournier (2)

1 Station d'Amélioration des espèces fruitières et ornementales
2 UT3 - Université Toulouse III - Paul Sabatier

Thirteen pear, Pyrus spp., cultivars were evaluated under field and laboratory conditions for resistance to Cacopsylla pyri (L.). In field studies, population growth was quantified over a 1-mo period of development. In the laboratory, the mode of host resistance was investigated by estimating oviposition and antibiosis. One cultivar and 3 pear species were found to be resistant to pear psylla ('Hosui', P. betulaefolia, P. pyrifolia, and P. ussuriensis); the remaining ones may be classified as susceptible (Doyennee du Comice, 'Williams', 'General Leclerc', and 'Moonglow'). Antibiosis was a main factor determining resistance in the test pears, and preference for oviposition was involved to a much lesser degree.

Mots clés: pear; resistance; antibiosis; Cacopsylla pyri

Mots clés: oviposition

Domaines: Biologie végétale; Phytopathologie et phytopharmacie

S. Berrada, T.X. Nguyen, J. Lemoine, J. Vanpoucke, D. Fournier. Thirteen pear species and cultivars evaluated for resistance to Cacopsylla pyri (Homoptera Psyllidae). Environmental Entomology, 1995, 24 (6), pp.1604-1607. ⟨hal-02712432⟩