1. Wstęp. 2. Burkholderia cepacia (Burkholder) Yabuuchi et al. 3. Burkholderia gladioli pv. alliicola (Burkholder) Young i wsp. 4. Bakterie z rodzaju Pseudomonas Migula 5. Serratia plymuthica i Serratia marcescens Bizio. 6. Pantoea ananatis (Serrano) Mergaert i wsp. 7. Pectobacterium carotovorum subsp. carotovorum (Jones) Waldee emend. Hauben i wsp. i Dickeya chrysanthemi Samson i wsp. 8. Enterobacter cloacae (Jordan) Hormaeche et Edwards. 9. Podsumowanie

Abstract: Bacterial diseases cause serious problems in cultivation of onion (Allium cepa L.) in Poland and abroad. There are several reasons of the losses in onion production caused by these diseases, e.g. weather conditions, biology and epidemiology of bacteria, lack of efficient pesticides, lack of disease-resistant cultivars. According to reports, onion is infected by following bacterial pathogens: Burkholderia gladioli pv. alliicola, Burkholderia cepacia, Pectobacterium carotovorum subsp. carotovorum, Dickeya chrysanthemi, Serratia plymuthica, Serratia marcescens, Enterobacter cloacae, Pantoea ananatis, Pseudomonas marginalis pv. marginalis and Pseudomonas viridiflava.

1. Introduction. 2. Burkholderia cepacia (Burkholder) Yabuuchi et al. 3. Burkholderia gladioli pv. alliicola (Burkholder) Young et al. 4. Genus Pseudomonas Migula bacteria 5. Serratia plymuthica and Serratia marcescens Bizio. 6. Pantoea ananatis (Serrano) Mergaert et al. 7. Pectobacterium carotovorum subsp. carotovorum (Jones) Waldee emend. Hauben et al. and Dickeya chrysanthemi Samson et al. 8. Enterobacter cloacae (Jordan) Hormaeche et Edwards. 9. Summary