Scientific Opinion on the pest categorisation of Erwinia amylovora (Burr.) Winsl. et al.

Erwinia amylovora, fire blight, pest categorisation, quarantine pest, regulated non-quarantine pest
First published in the EFSA Journal
11 December 2014
Adopted
27 November 2014
Type
Scientific Opinion

Abstract

The European Commission requested the EFSA Panel on Plant Health to perform the pest categorisation for Erwinia amylovora, which is the causal agent of fire blight. E. amylovora is a plant pathogenic bacterium regulated by the Directive 2000/29/EC (Annexes II-A-II). E. amylovora is a single taxonomic entity. This organism can be accurately identified, based on a range of discriminative methods. Detection methods are available for symptomatic and asymptomatic plant material. E. amylovora ispresent in all EU Member States except Estonia, Finland and Malta, where host plants are not widely distributed or are rare. The host plants (mainly pear and apple) are cultivated throughout Europe where environmental conditions are conducive to disease development. Although no recent data are available on losses caused by E. amylovora in the EU, fire blight is considered to be the most destructive disease on pear and apple owing to the loss of trees. The analysis of past disease outbreaks previously reported in the EU highlights their considerable potential to have a severe impact on commercial horticulture, especially on apple, pear and quince, as well as on ornamentals and on nursery trade. The disease causes a range of symptoms on the aerial parts of plants, including the fruits, and E. amylovora often kills the trees and causes destructive outbreaks. Contaminated rootstocks, cuttings and grafted trees for transplanting, beehive transportation, rain and wind, are responsible for medium- and long-distance  dissemination of the pathogen. Existing control is mainly based on prevention and exclusion. The use of chemical or biological products can prevent infection, and sanitation methods applied to infected plants can control the disease to a certain extent. No curative chemical control agents are available that eradicate E. amylovora in infected orchards.

Panel members at the time of adoption

Richard Baker, Claude Bragard, David Caffier, Thierry Candresse, Gianni Gilioli, Jean-Claude Grégoire, Imre Holb, Michael John Jeger, Olia Evtimova Karadjova, Christer Magnusson, David Makowski, Charles Manceau, Maria Navajas, Trond Rafoss, Vittorio Rossi, Jan Schans, Gritta Schrader, Gregor Urek, Irene Vloutoglou, Stephan Winter and Wopke van der Werf.
Panel on Plant Health
Contact
alpha [at] efsa.europa.eu
doi
10.2903/j.efsa.2014.3922
EFSA Journal 2014;12(12):3922
Question Number
On request from
European Commission