Conifer-overwintering
Guides
Cacopsylla
jumping plant lice, pear psyllids
Cacopsylla is a genus of jumping plant lice (family Psyllidae) comprising species that are significant agricultural pests, particularly of fruit trees. The genus includes most psyllids within subfamily Psyllinae that cause economic damage to orchards. Several species act as vectors for phytoplasma-associated diseases including Apple Proliferation, European Stone Fruit Yellows, and Pear Decline. Phylogenetic studies reveal two major clades that diverged in the Miocene, with Clade I predominantly univoltine species that overwinter on conifers. Vector competence has evolved independently rather than through shared ancestry.