The psyllid species Cacopsylla melanoneura (Fo� rster) and Cacopsylla picta (Fo� rster) are vectors of �Candidatus Phytoplasma mali�, the causal agent of apple proliferation, one of the economically most important apple diseases in Europe. Both vectors are present in apple orchards of South Tyrol and Trentino provinces in Northern Italy. As no direct treatment of the disease…