Siphoninus phillyreae

(Haliday, 1835)

ash whitefly

, commonly known as the , is a whitefly native to western Eurasia, India, and North Africa. It has been introduced to North America, South America, and Oceania, where it is recognized as a significant agricultural pest. The species feeds on a broad range of plants including ash, pomegranate, apple, pear, and other fruit trees. Encarsia inaron is a primary used for its .

Siphoninus phillyreae by (c) Alice Shanks, some rights reserved (CC BY), uploaded by Alice Shanks. Used under a CC-BY license.

Siphoninus.phillyreae by James K. Lindsey. Used under a CC BY-SA 3.0 license.

Ash whitefly - Siphoninus phillyreae (29974458916) by Oregon State University. Used under a CC BY-SA 2.0 license.

Pronunciation

How to pronounce Siphoninus phillyreae: /sɪˈfoʊnɪnəs ˌfɪlɪˈriːaɪ/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

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Habitat

Found in agricultural orchards, particularly pomegranate, apple, and pear orchards, as well as urban and suburban landscapes where ash and ornamental pear trees are present. In Egypt, varies with tree direction and level, with distinct vertical distribution patterns observed on pomegranate trees.

Distribution

Native to western Eurasia, India, and North Africa. Introduced to North America (USA: California, Florida, Nevada; Mexico), South America (Argentina, Chile, Venezuela, Brazil, Peru), and Oceania (Australia, New Zealand). In Europe: Austria, Bulgaria, Croatia, Cyprus, Czech Republic, France, Corsica, Germany, Greece, Hungary, Ireland, Italy, Sicily, Netherlands, Poland, Portugal, Romania, Russia, Spain, Canary Islands, UK, England and Wales, Ukraine. In Asia: India (Andhra Pradesh, Bihar, Gujarat, Karnataka, Maharashtra, Tamil Nadu, Uttar Pradesh), Iran, Israel, Japan (Honshu, Kyushu), Oman, Pakistan, Saudi Arabia, Syria, Turkey, Turkmenistan. In Africa: Cameroon, Egypt, Eritrea, Ethiopia, Libya, Morocco, South Africa, Sudan, Tunisia.

Diet

Phloem-feeding on plant sap. on multiple plant including Oleaceae (Fraxinus, Olea, Phillyrea), Rosaceae (Crataegus, Cydonia, Malus, Prunus, Pyrus), Lythraceae (Punica granatum), and others. Ovipositional preference studies show distinct ranking among tested , with survival rates varying significantly by host plant.

Host Associations

Punica granatum - pestMajor agricultural ; first recorded in Greece in 2012, established in Brazil, Egypt, and elsewhere
Fraxinus spp. - pestPrimary giving rise to ''
Malus domestica - pestSignificant fruit tree ; oviposition and development documented on 'Granny Smith' cultivar
Pyrus communis - pestPear orchards affected; 'Bartlett' cultivar studied for suitability
Prunus persica - pestPeach ; 'O'Henry' cultivar evaluated
Olea europaea - pestDocumented in Oleaceae
Phillyrea spp. - pest referenced in specific epithet
Citrus sinensis - Navel orange evaluated as ; oviposition observed but relative preference lower than some other hosts
Heteromeles arbutifolia - Toyon evaluated as in California studies
Pistacia vera - Pistachio 'Kerman' cultivar tested for suitability

Life Cycle

Developmental time and survival are strongly influenced by plant and temperature. to development varies with thermal conditions; is temperature-dependent as demonstrated in controlled studies. Multiple per year occur in favorable climates, with seasonal abundance peaking during warmer periods in Mediterranean and subtropical regions.

Ecological Role

Serves as for multiple including Encarsia inaron, Encarsia partenopea, and Encarsia brasiliensis. include the ladybird beetle Clitostethus arcuatus and the drosophilid fly Aclctozenus indica. are interdependent with natural enemy abundance and influenced by weather factors including minimum temperature and humidity.

Human Relevance

Significant agricultural pest causing economic damage to pomegranate, apple, pear, and other fruit crops. Defoliation and reduced productivity documented in orchards. Subject to programs employing through (Encarsia inaron, Encarsia partenopea) and conservation (Clitostethus arcuatus). Neonicotinoid applications used in some management contexts, with resistance concerns noted.

Similar Taxa

Singhiella simplexBoth are whitefly associated with ornamental and fruit trees, but S. simplex is specifically tied to Ficus species and causes severe defoliation of Ficus benjamina hedges, whereas S. phillyreae has a broader range including ash and pome fruits
Bemisia tabaciBoth are agricultural whitefly pests, but B. tabaci has a much broader range and is of plant viruses; S. phillyreae is distinguished by association with ash and specific fruit trees
Aleurodicus rugioperculatusBoth occur on ornamental plants in subtropical regions, but spiraling whitefly produces distinctive spiral wax patterns on leaves not characteristic of S. phillyreae