Fireblight (Erwinia amylovora) of pome fruits in Hungary: national phytosanitary measures and management of the disease

Abstract

After the first detection of Erwinia amylovora in Hungary, as a result of an intensive survey started in spring 1996, it was concluded that the incidence of fireblight was highest in a zone 10–30 km wide and 200–250 km long near the southern and south‐eastern border. The disease was concentrated in the Békés, Bács‐Kiskun and Csongrád counties. Isolated infection foci were, however, also found in Baranya county. In 1997, further spread of the disease was recorded. Only three of the 19 counties could be considered as free from the disease. The disease attacked nine major host plants, but the majority of infected plants were quince and pear. During the eradication campaign in 1996, more than 60 000 trees were uprooted and destroyed across the country. Eradication was performed partly by special work teams and partly with the participation of growers. The pathogen most probably entered Hungary by aerial drift from Romania or Yugoslavia during the previous 2 or 3 years. In the interior of the country, introduction through nursery stock and possibly infested tools, as well as wind and insect movement, cannot be excluded. Major measures to control the disease are discussed.