The bacterial origin of fireblight was demonstrated more than a centur
y ago, in 1886. In spite of intensive research since then, however, it
s control remains a challenge under certain conditions. Nevertheless,
several approaches, preferably used in combination, may lead to reason
able success, It seems that further improvements of control are more l
ikely to be obtained from the plantation of less susceptible varieties
, and from the more common use of already available warning systems, t
han from a questionable release of new chemicals or biological agents
to combat Erwinia amylovora.