Link to home

Distribution of Xylella fastidiosa in Oaks in Florida and Its Association with Growth Decline in Quercus laevis

May 1998 , Volume 82 , Number  5
Pages  569 - 572

E. L. Barnard , Forest Pathologist , and E. C. Ash , Forest Biologist, Florida Division of Forestry, Forest Health Section, Gainesville 32614-7100 ; D. L. Hopkins , Professor of Plant Pathology, University of Florida, Central Florida REC, Leesburg 34748-8232 ; and R. J. McGovern , Associate Professor of Plant Pathology, University of Florida, Gulf Coast REC, Bradenton 34203-9324

Go to article:
Accepted for publication 9 February 1998.

A survey of more than 200 trees has documented the widespread occurrence of Xylella fastidiosa in Florida oak populations. The pathogen was detected readily via enzyme-linked immunosorbent assay in oaks exhibiting decline or leaf scorch symptoms and was infrequently detected in asymptomatic trees. It was also associated with reduced growth in Quercus laevis as measured by current-year shoot length. The occurrence of X. fastidiosa in Q. laevis and the evidence for its occurrence in Q. incana represent first reports for these oak hosts. The role of X. fastidiosa in oak decline scenarios deserves further attention.

Additional keywords: leaf scorch, oak decline, Quercus spp.

The American Phytopathological Society, 1998