http://www.nature.com/polopoly_fs/1.17651!/menu/main/topColumns/topLeftColumn/pdf/nature.2015.17651.pdf
I don't know, but in any case, there is now a critical need to find a way to kill these bacteria.
A hot wet season and some hornamental plants traded from central america to nederland and Apulia produced the conditions for spreading. A froghopper philaenus spumarius feeds on xylem and was the vector to the olivs. It is interesting to stress that many riparian plants are host to bacteriun without any damage. Apparently a Ph variation induced by drought makes the bacteria to aggregate in clumps that kill the tree. One possible way is clearing riparian hosts by raising their xylem pH (possibly).
Guido Bongi - I am very interested in learning more about the pH mediated aggregation of Xylella you mention. I study Xylella fastidiosa in blueberries and would like to read any publications that explore that link. If possible, please attach the publication(s), or provide references. Thank you!
I am interested - the question is whether the EPPO and EU in general is interested? I hardly believe EU is ready to even consider evaluation of most promising effective methods for preventive and curative control - such as tree injection of plant protective compounds and plant resistance activators.
We could explore anyway their interests ? I will contact after my return form Europe and will draft some suggestions. Best regards
I add a review in Italian that can be useful for refs http://www.fondazionevillafabri.org/osservatorio/allegati_content/newsletter-7-giugno-2015.pdf. As far Deanna question The Sally wilkinson paper about xylem is illuminating for xylem pH control http://jxb.oxfordjournals.org/content/59/3/619.long
Wulff et al. papaer about pH effects is focusing on Xylella and pH related aggregation http://www.ncbi.nlm.nih.gov/pubmed/18461383
Do not forget that the combination of the two evidences is merely a logical exercise if one can not modify the pH of alternative hosts or treat all stock plants for removing the ones that were infected. This is possible with NaHCO3 in variable concentrated solution and mineral oil, but plant tolerance end penetration are exèerimental matters
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