ISHS Acta Horticulturae 694: International Symposium on Harnessing the Potential of Horticulture in the Asian-Pacific Region
RESISTANCE TO PEAR SCAB IN EUROPEAN AND ASIAN PEAR CULTIVARS IN AUSTRALIA |
| Authors: | O.N. Villalta, W.S. Washington , G.R. McGregor, S.M. Richards, S.M. Liu |
| Keywords: | Venturia pirina, Pyrus communis, Pyrus pyrifolia, pear breeding |
| Abstract:
A series of artificially inoculated glasshouse experiments and naturally infested field trials were conducted to determine the susceptibility of leaves of European and Asian pear cultivars to pear scab in Victoria, Australia. The two commercially important European cultivars ‘Packham’s Triumph’ and ‘Williams Bon Chretien’ were equally highly susceptible to pear scab following inoculations in the glasshouse and at one field site (Knoxfield), but ‘Packham’s Triumph’ was less susceptible than ‘Williams Bon Chretien’ at another field site (Tatura). The European cultivars ‘Corella’, ‘Doyenne du Comice’ and ‘Pound’ showed good levels of resistance against Venturia pirina in glasshouse experiments and field trials. The other nine European cultivars were susceptible to pear scab at the two field sites. The Asian pears ‘Tsu Li’, ‘Hosui’ and ‘Twentieth Century’, and the rootstock Pyrus calleryana were immune to infection. Hood and Flordahome cultivars, produced by crossing European and Asian cultivars, were also immune to infection. The Chinese cultivar ‘Ya Li’ was also immune to leaf infection at one field site, but showed some hypersensitive leaf reactions (resistant reactions) following glasshouse inoculations and natural infections at another field site. | |
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