EPPO Global Database

EPPO Reporting Service no. 04 - 2020 Num. article: 2020/072

Update on the situation of Trioza erytreae in Portugal

In mainland Portugal, Trioza erytreae (Hemiptera: Triozidae – EPPO A2 List, vector of huanglongbing) was first found in the region of Porto in January 2015 (EPPO RS 2015/204) and progressively spread to Norte and Centro regions (RS 2017/167, RS 2018/212). The NPPO of Portugal is conducting official monitoring. As a result of new detections, the demarcated areas have been enlarged. A buffer zone of 3 km has been established around the parishes where the pest was found. The measures in place include insecticide treatments, severe pruning, prohibition to produce, commercialize or move hosts plants, except fruits, within the whole demarcated area. Surveillance zones of 10 km radius beyond the limits of the demarcated areas were also established, where intensive monitoring takes place. An updated map of the demarcated areas is available on the Internet. Outbreaks have been reported mainly along the coast in Norte and Centro regions, as well as in the Área Metropolitana de Lisboa. The parasitoid Tamarixia dryi has been released to attempt biological control in several sites in Portugal as well as in Galicia (Spain). 

The pest status of Trioza erytreae in Portugal is officially declared as: Present, only in some parts of the Member State concerned, under containment, in case eradication is impossible.


Arenas-Arenas FJ, Duran-Vila N, Quinto J Hervalejo A (2019) Geographic spread and inter-annual evolution of populations of Trioza erytreae in the Iberian Peninsula. Journal of Plant Patholology 101,1151–1157. https://doi.org/10.1007/s42161-019-00301-x

NPPO of Portugal (2019-09).

Pérez-Rodríguez J, Krüger K, Pérez-Hedo M, Ruíz-Rivero O, Urbaneja A, Tena A (2019) Classical biological control of the African citrus psyllid Trioza erytreae, a major threat to the European citrus industry. Science Report 9, 9440. https://doi.org/10.1038/s41598-019-45294-w


- DGAV website. Despacho n.º 16/G/2020, de 14 de abril, relativo à atualização da Zona Demarcada para Trioza erytreae e medidas a aplicar para a sua erradicação (2020-04-14). http://srvbamid.dgv.min-agricultura.pt/portal/page/portal/DGV/noticia/?detalhe_noticia=38665174

- DGAV website. Iniciado o programa experimental de luta biológica contra a Trioza erytreaehttp://srvbamid.dgv.min-agricultura.pt/portal/page/portal/DGV/noticia/?detalhe_noticia=838153

- IVIA website. L'IVIA contribueix al seguiment de la solta de 'Tamarixia dryi', l'insecte que frena l'expansió del vector del 'greening' en els cítrics