Open AccessReactions of different plant organs of pear cultivars to Erwinia amylovora infection
Author(s) -
K. Honty,
Z. Boldog,
M. Göndör,
J. Papp,
Kenneth Kasa,
M. Hevesi
Publication year - 2003
Publication title -
international journal of horticultural science
Language(s) - English
Resource type - Journals
eISSN - 2676-931X
pISSN - 1585-0404
DOI - 10.31421/ijhs/9/1/369
Subject(s) - erwinia , fire blight , pear , cultivar , biology , inoculation , shoot , horticulture , quarantine , botany , bacteria , genetics , ecology
Research project has been initiated in 1999 with the aim of evaluating the degree of susceptibility/resistance of pear cultivars grown in Hungary to fire blight disease caused by Erwinia amylovora. The recently selected promising cultivars were also examined. Inoculation experiments were conducted in controlled greenhouse conditions because of quarantine regulations in Hungary. Following the disease process, development of symptoms of plant organs (shoots, flower parts, fruits) was observed. Suspension of two E. amylovora strains (Ea 21, Ea 23) isolated from pear was used in a mixture (5x108 cells x m1-1) for the inoculation. Twenty-six pear cultivars were examined and grouped into four categories: low susceptibility, moderately susceptible, susceptible and very susceptible. Most of the cultivars were susceptible or very susceptible while some promising 'Eldorado', 'Harrow Delight' and `Hosui' showed low susceptibility.