Xylella Outbreak Confirmed in Calabria, Italy: What It Means for Olive Oil Buyers

Italian authorities have confirmed the first known outbreak of the olive-killing bacterium Xylella fastidiosa subspecies pauca outside the Puglia region, after seven infected olive trees were found in Taurianova, in southern Calabria, prompting an immediate eradication and surveillance campaign.

How Italy Is Containing the Outbreak

Following confirmation by Italy’s National Reference Laboratory in Rome, Calabria’s regional government allocated €300,000 for emergency containment and activated a plan built around a 50-meter infected zone around each positive tree and a wider 2.5-kilometer buffer zone for intensive testing. The surveillance area covers an estimated 80,000 olive trees across roughly 1,200 hectares of groves, and only Xylella-resistant cultivars such as Leccino and Favolosa may now be replanted within the infected zone. Calabria is one of Italy’s three largest olive oil-producing regions, alongside Puglia and Sicily, producing 30,000 to 35,000 tons of oil in an average year, which is why regional farming associations have welcomed the rapid response.

Why This Matters Beyond Calabria

Xylella fastidiosa has already destroyed millions of olive trees in Puglia since it first appeared there in 2013, and its confirmed jump to a new Italian region is a reminder that the disease can travel through infected plant material and insect vectors like the meadow spittlebug. Producers and buyers across the wider Mediterranean olive belt, including Tunisia, are watching the containment effort closely: Xylella’s track record of spreading underscores why sourcing bulk or bottled Tunisian olive oil from verified suppliers with clear traceability and phytosanitary standards matters as much as price or origin claims.

FAQ

What is Xylella fastidiosa? Xylella fastidiosa is a bacterium spread mainly by insect vectors that blocks water flow inside infected trees, causing olive trees to wither and die; its pauca subspecies has killed millions of olive trees in southern Italy since 2013.

Has Xylella fastidiosa been found in Tunisia? No confirmed Xylella fastidiosa outbreak has been reported in Tunisia as of September 2026; the disease remains concentrated in southern Italy, though Mediterranean olive-growing countries continue to monitor for it given how easily it can spread through infected plant material.

Source: Olive Oil Times