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How an Olive Oil Lover Found Success in The US Market
High Prices Are Changing How Italians Feel About Olive Oil
Xylella May Not Be Responsible for Olive Tree Devastation in Puglia, Study Finds
The rebuttal to our article from Donato Boscia, the unit manager of the Institute
for Sustainable Plant Protection in Bari of the National Research Council, requires
some clarification
It should be stressed that the initial studies concerning the olive decline in Salento
attributed the phenomenon to a number of pathogens: the “complex” disease,
including also some fungi. But, upon the identification of Xylella fastidiosa subsp.
pauca, the bacterium has been retained as the sole causal agent of Olive Quick
Decline Syndrome (OQDS).
Consequently, from 2015 onward, every decline symptom identified on olive trees,
such as leaf, twig and branch dieback, was attributed to the bacterium, and this
assumption was largely conveyed to farmers, agronomists, journalists and
politicians.
See Also:Xylella May Not Be Responsible for Olive Tree Devastation in Puglia,
Study Finds
During the monitoring surveys, the regional inspectors have, consequently, collected
samples from olive trees that visibly show some of such symptoms just because
they are suspected to be caused by Xylella fastidiosa.
By checking the data collected by the regional phytosanitary inspectors of Puglia,
one question arises. If, from 2016 until 2022, the percentage of olive trees that
visibly show symptoms of decline tested positive for the occurrence of Xylella
fastidiosa is in a range of 22.5 percent to 3.21 percent, which other pathogens
caused the symptoms in the remaining 78 to 97 percent of olive trees?
Within this scenario, it should be outlined that, in the pathogenicity tests, Xylella
fastidiosa subsp. pauca causes some leaf wilting on the inoculated plants more than
one year after the inoculation, whereas fungi belonging to Neofusicoccum spp.,
isolated in the same areas of Salento affected by the olive disease, are capable of
killing the whole plant in two to three weeks (Scortchini et al., 2023).
- 434 -
High Prices Are Changing How Italians Feel About Olive Oil
Xylella May Not Be Responsible for Olive Tree Devastation in Puglia, Study Finds
The rebuttal to our article from Donato Boscia, the unit manager of the Institute
for Sustainable Plant Protection in Bari of the National Research Council, requires
some clarification
It should be stressed that the initial studies concerning the olive decline in Salento
attributed the phenomenon to a number of pathogens: the “complex” disease,
including also some fungi. But, upon the identification of Xylella fastidiosa subsp.
pauca, the bacterium has been retained as the sole causal agent of Olive Quick
Decline Syndrome (OQDS).
Consequently, from 2015 onward, every decline symptom identified on olive trees,
such as leaf, twig and branch dieback, was attributed to the bacterium, and this
assumption was largely conveyed to farmers, agronomists, journalists and
politicians.
See Also:Xylella May Not Be Responsible for Olive Tree Devastation in Puglia,
Study Finds
During the monitoring surveys, the regional inspectors have, consequently, collected
samples from olive trees that visibly show some of such symptoms just because
they are suspected to be caused by Xylella fastidiosa.
By checking the data collected by the regional phytosanitary inspectors of Puglia,
one question arises. If, from 2016 until 2022, the percentage of olive trees that
visibly show symptoms of decline tested positive for the occurrence of Xylella
fastidiosa is in a range of 22.5 percent to 3.21 percent, which other pathogens
caused the symptoms in the remaining 78 to 97 percent of olive trees?
Within this scenario, it should be outlined that, in the pathogenicity tests, Xylella
fastidiosa subsp. pauca causes some leaf wilting on the inoculated plants more than
one year after the inoculation, whereas fungi belonging to Neofusicoccum spp.,
isolated in the same areas of Salento affected by the olive disease, are capable of
killing the whole plant in two to three weeks (Scortchini et al., 2023).
- 434 -
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