You searched for: “leptonecrosis
A graft transmissible disease that produces necrotic symptoms in Japanese plum cultivars and apricot cultivars; also known as "apricot chlorotic leaf rolling".

Cultivars are species of plants that are specifically selected and cultivated.

Plum leptonecrosis seems to be present in all European countries where Japanese plum is grown which are associated with mycoplasma (any of numerous parasitic, pathogenic microorganisms) resulting in plum decline (Leptonecrosis).