Quarantine plant pathogen

Xylella fastidiosa → Lepyronia quadrangularis → 'Candidatus Phytoplasma ulmi'

Source EPPO: XYLEFA Vector EPPO: LEPOQU Target EPPO: PHYPUL
RU A1 P-P potential

← To all hypotheses

Scoring

All four metrics are dimensionless. The total score is the product of specificity, host distance and confidence.

0.500
Specificity
1 / the number of pathogens on the vector — this vector carries 2 pathogens in EPPO.
1.00
Host distance
1.0 = no shared hosts · 0.5 = shared family · 0.2 = shared genus · 0.0 = shared species.
0.25
Confidence (P-P)
K = confirmed vector (1.0), P = potential (0.5); both edges are multiplied.
0.125
Total
specificity × host distance × confidence

Distribution: 'Candidatus Phytoplasma ulmi'

Countries with recorded presence per the EPPO Global Database (16 ISO codes).

USCASIATFRRSCLCZITGBHRPLBEDENLCH

Host plants: 'Candidatus Phytoplasma ulmi'

Top 10 host taxa per EPPO; classes per EPPO host categorisation.

  • Ugni molinae MYVUG Host
  • Ulmus alata ULMAL Host
  • Ulmus americana ULMAM Host
  • Ulmus canescens ULMCA Host
  • Ulmus chenmoui ULMCH Host
  • Ulmus crassifolia ULMCR Host
  • Ulmus davidiana var. japonica ULMJA Host
  • Ulmus glabra ULMGL Host
  • Ulmus laevis ULMLV Host
  • Ulmus minor ULMMI Host

Synonyms: 'Candidatus Phytoplasma ulmi'

  • yellows of elm
  • phloem necrosis of elm
  • elm yellows
  • nécrose du liber de l'orme
  • Elm yellows phytoplasma
  • Elm phloem necrosis phytoplasma
  • Phytoplasma ulmi
  • fitoplasma dos amarelos do ulmeiro

Sources

Xylella fastidiosa ↔ Lepyronia quadrangularis

* Sanderlin, R. S., and R. A. Melanson (2010) Insect transmission of Xylella fastidiosa to pecan. Plant Disease 94, 465-470. 
-------  Pecan bacterial leaf scorch. In experiments where Lepyronia quadrangularis specimens were caged on pecan trees, one out of six trees tested with two specimens became infected. The authors conclude that L. quadrangularis could be an occasional vector.

Lepyronia quadrangularis ↔ 'Candidatus Phytoplasma ulmi'

* Rosa C, Mc Carthy E, Duong K, Hoover G, Moorman G (2014) First report of the spittlebug Lepyronia quadrangularis and the leafhopper Latalus sp. as vectors of the Elm yellows associated phytoplasma, Candidatus Phytoplasma ulmi in North America. Plant Disease 98(1), 154-155.
------- In experiments.