Psylla (from the Greek psulla, meaning flea) is a genus of sap-sucking insects belonging to the order Hemiptera. There are at least 110 described species in Psylla. Species within the genus feed on various host plants.
Some harmful species commonly known as flies belong to neighbouring genera, such as Cacopsylla (which includes most of the pyslla harmful to fruit trees), the Albizia fly (Acizzia jamatonica, from the Psyllidae family) and the laurel fly (Trioza alacris).
Species and hosts
Psylla alni feeds on alders
Psylla apicalis feeds on kōwhai trees
Psylla betulae feeds on birches
Psylla buxi feeds on box (Buxus species) Psylla cordata feeds on limes (Tilia species) Psylla frodobagginsi feeds on kōwhai trees Psylla oblonga feeds on Albizia odoratissima Psylla pyri feeds on European pear trees