'Candidates Phytoplasma prunorum': the phytoplasma infection of Cacopsylla pruni from apricot orchards and from overwintering habitats in Moravia (Czech Republic)

The incidence of individuals of Cacopsylla pruni infected with 'Candidatus Phytoplasma prunorum' was analysed by PCR/RFLP in single insects captured during a growing season in selected apricot plantations in southern Moravia (Czech Republic). A portion of adults of both overwintering and new generation of the psyllid was determined as positive for the phytoplasma presence. It was found that conifers growing in the investigated hilly sites of middle Moravia harbour C. pruni during the winter season. The presence of the phytoplasma positive individuals of the species was determined in 3 of 4 batches of specimens from overwintering sites.