Psylla pyri is one of the most important pear phytophagics; because of the numerous chemical interventions, its dangerousness is increased, reducing the phytopathogenics's populations of this bug. It is not, however, considered a harmful bug since it is easily censurable with simple interventions, which have favored a resumption of the Psylla's natural enemies. Psylla's adults are long, around 2.5-3 mm, and of ochre or brownish color; the wings are transparent and positioned to sloping roof on the body.