Phytoplasmas associated with ash decline

Jerald S. Bricker, Jean C. Stutz

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

The epidemiology and etiology of a disease of Fraxinus velutina (Arizona or velvet ash) called ash decline was investigated, Symptoms of ash decline include a progressive dieback of stems and branches as well as yellowing and necrosis of leaf tissue. The incidence and severity of ash decline in F. velutina cv. Modesto trees in the Phoenix, Arizona, U.S., metropolitan area was studied over an 8-year period. Symptom severity increased dramatically during this time period with a 30% mortality rate of trees in the study group. Etiological studies determined that phytoplasmas were associated with ash trees showing ash decline symptoms. Phytoplasmas were detected in the phloem sieve tube elements of plants using the DAPI microscopic test, and phytoplasma DNA was detected in ash tissue using a polymerase chain reaction (PCR) assay. The relationship of the phytoplasmas associated with ash decline to the ash yellows (Ash Y) phytoplasmas is discussed.

Original languageEnglish (US)
Pages (from-to)193-199
Number of pages7
JournalJournal of Arboriculture
Volume30
Issue number3
StatePublished - May 1 2004

Keywords

  • Ash decline
  • Ash yellows
  • Phytoplasma
  • Verlvet ash

ASJC Scopus subject areas

  • Forestry
  • Ecology

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    Bricker, J. S., & Stutz, J. C. (2004). Phytoplasmas associated with ash decline. Journal of Arboriculture, 30(3), 193-199.