EPPO has reported new haplotypes of ‘Candidatus Liberibacter solanacearum’ in its last EPPO Reporting Service 2019 no. 2.
The newly described haplotype U was identified in Finland. It was found in the psyllid, Trioza urticae (Hemiptera: Triozidae), and its host plant, Urticae dioica (stinging nettle; Urticaceae). This is the first report of ‘Candidatus Liberibacter solanacearum’ in a plant that belongs to neither Solanaceae nor Apiaceae. It is not known if this haplotype poses a risk to crops in Europe (Haapalainen et al., 2018). An unknown haplotype of ‘Candidatus Liberibacter solanacearum’ was also detected in a single specimen of Trioza urticae from a suction trap in Germany (Sjolund et al., 2019).
The two publications were made as part of the research activities carried out within the framework of the POnTE Project.
A new haplotype of ‘Candidatus Liberibacter solanacearum’ (haplotype F) has been found in potato (Solanum tuberosum) in the USA (Swisher Grimm and Garczynski, 2019). Up to now only haplotypes A and B have been found in potato in the USA. This is the 7th haplotype described.