Psylla

{{For|the town of ancient Bithynia in Asia Minor|Psylla (Bithynia)}}

{{Automatic taxobox

| image = Psylla alni male.jpg

| image_caption = Psylla alni

| taxon = Psylla

| authority = Geoffroy, 1762

| diversity_link = List of Psylla species

| diversity = at least 110 species

| synonyms = * Asphagis {{Au|Enderlein, 1921}}

Baeopelma syn. nov.
Chamaepsylla syn. nov.
Psylla (Labyrinthopsylla) syn. nov.

| synonyms_ref = {{cite journal |title=An updated classification of the jumping plant-lice (Hemiptera: Psylloidea) integrating molecular and morphological evidence |date=2021 |last1=Burckhardt |first1=Daniel |last2=Ouvrard |first2=David |last3=Percy |first3=Diana M. |journal=European Journal of Taxonomy |issue=736 |pages=137–182 |doi=10.5852/ejt.2021.736.1257}}

}}

File:Psyllina spec..jpg

File:Hornbeam Psyllid Nymph - Flickr - treegrow (1).jpg

Psylla (from the Greek psulla, meaning flea) is the type genus of sap-sucking insects in the family Psyllidae. There are at least 110 described species in Psylla. Species within the genus feed on various host plants.

Some agricultural pests, previously placed here, are now in related genera, such as Cacopsylla (which includes at least two species harmful to fruit trees); other revised species names include the "Albizia fly" (Acizzia jamatonica, in the same family) and the laurel fly (Trioza alacris in the family Triozidae).

Selected species and hosts

Psylla alni feeds on alders: this is the type species (as Chermes alni {{Au|Linnaeus, 1758}})
Psylla apicalis feeds on kōwhai trees{{cite journal |last1=Yue |first1=Bi-Song |last2=Martoni |first2=Francesco |last3=Armstrong |first3=Karen |year=2019 |title=Resolving an 87-year-old taxonomical curiosity with the description of Psylla frodobagginsi sp. nov. (Hemiptera: Sternorrhyncha: Psyllidae), a second distinct Psylla species on the New Zealand endemic plant kōwhai |url=https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0221316 |journal=PLOS ONE |volume=14 |issue=9 |pages=e0221316 |bibcode=2019PLoSO..1421316M |doi=10.1371/journal.pone.0221316 |issn=1932-6203 |pmc=6750570 |pmid=31532775 |doi-access=free}}
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