Weeds as Alternative Hosts of the Citrus, Coffee, and Plum Strains of Xylella fastidiosa in Brazil

Plant Disease
Silvio LopesJoão R S Lopes

Abstract

In Brazil, Xylella fastidiosa is present in citrus (Citrus sinensis), coffee (Coffea arabica), and plum (Prunus sp.) crops, causing the citrus variegated chlorosis (CVC), coffee leaf scorch (CLS), and plum leaf scald (PLS). Also present in these crops and infesting weeds, which ultimately could serve as sources of inoculum for the cultivated trees, are diverse populations of xylem-feeding leafhopper vectors. In order to assess host range of X. fastidiosa among weeds and to better understand their role in epidemics, field surveys, mechanical inoculations, and insect transmission tests were conducted. Polymerase chain reaction (PCR) and culture plating were used to detect the pathogen from plant tissues. X. fastidiosa was detected in 10 out of 23 species of the weed plants sampled in two citrus groves affected by CVC. None of the weed plants showed external symptoms. In the greenhouse, the average percentages of infection on plants mechanically inoculated with the CVC, CLS, and PLS strains of X. fastidiosa were, respectively, 25, 10, 0 in Medicago sativa; 70, 45, 20 in Echinochloa crus-galli; 45, 30, 0 in Brachiaria decumbens; 72, 70, 40 in Brachiaria plantaginea; 13, 10, 0 in Digitaria horizontalis; 31, 30, 0 in Solanum american...Continue Reading

References

Mar 29, 2001·Current Microbiology·S A LopesL B Grelen
Apr 26, 2001·International Journal of Systematic and Evolutionary Microbiology·A Mehta, Y B Rosato
Aug 1, 1981·Applied and Environmental Microbiology·J M WellsS K Lowe

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Citations

Nov 1, 2015·Plant Disease·Rodrigo P P Almeida, Leonard Nunney
Sep 1, 2012·Plant Disease·A L GarciaS A Lopes
May 15, 2019·EFSA Journal·UNKNOWN EFSA Panel on Plant Health (PLH)Stephen Parnell
Jan 29, 2013·Applied and Environmental Microbiology·Leonard NunneyRichard Stouthamer
Feb 15, 2011·Applied and Environmental Microbiology·Helvécio D Coletta-FilhoRodrigo P P Almeida
Oct 12, 2016·Genetics and Molecular Biology·João Lúcio AzevedoPaulo Teixeira Lacava
May 1, 2012·Applied and Environmental Microbiology·Leonard NunneyRichard Stouthamer
May 21, 2013·Annual Review of Phytopathology·Alexander Purcell
Jul 1, 2006·Plant Disease·Elaine B ShaplandMario A Viveros
May 16, 2006·Canadian Journal of Microbiology·Fernando D AndreoteJoão Lúcio Azevedo
Mar 26, 2021·Pest Management Science·Renato B BassaneziAlécio S Moreira
Dec 25, 2007·BMC Genomics·Vivian S da SilvaRegina Costa de Oliveira

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