Luxembourg confirms Xylella fastidiosa in its Moselle wine region, forcing vine destruction

Luxembourg’s Agriculture, Food and Viticulture Ministry has confirmed the presence of the plant bacterium Xylella fastidiosa at three sites in the country’s Moselle wine-growing region, setting off mandatory eradication measures in an area that includes vineyards along the border with Germany.

The ministry said the bacterium was confirmed on Oct. 12. The discovery affects three locations in Luxembourg’s Moselle viticultural zone, an important wine-producing area in the southeast of the country. Authorities have since marked out infected zones with a radius of 50 meters around each infected plant and buffer zones with a radius of 2.5 kilometers around each infected area.

The infected zones cover a total of 2.35 hectares. Within those areas, officials have ordered the identification, removal and destruction of infected or suspected plants, as well as plants of the same species as the infected plants even when they do not show symptoms. The ministry said all grapevines affected by those measures must be uprooted and destroyed.

Growers affected by the sanitary measures will receive compensation for the losses caused by the destruction of their vines, according to the ministry.

Xylella fastidiosa is considered one of the most serious plant pathogens in Europe because it can infect a wide range of plant species, including grapevines. The bacterium disrupts the movement of sap inside the plant. That can cause leaves and shoots to dry out and can eventually kill the plant.

Authorities said the pathogen is mainly spread by insects that feed on plant sap. It can also be moved through the transport of infected plants. There is currently no treatment that can cure infected plants, which is why European control policy is based on containment and destruction.

The confirmation in Luxembourg places the country among a growing list of European Union members that have had to respond to outbreaks of the bacterium. Cases have already been reported in Italy, France, Spain and Portugal. In several of those countries, the pathogen has caused major losses in agriculture and led to long-running efforts to control its spread.

The Luxembourg measures are being carried out under plant health rules that require rapid intervention once the bacterium is found. The destruction order extends beyond visibly infected plants because symptoms can take time to appear, while the bacterium may already be present and capable of spreading.

The ministry said similar measures are being taken by German authorities in the affected part of their territory. That reflects the cross-border nature of the Moselle wine region, where vineyards and agricultural land stretch across national boundaries and where plant health risks can quickly become a shared issue.

The finding is a concern for wine producers because grapevines are among the host plants susceptible to the bacterium. While the ministry did not provide a full breakdown of the plant species involved at each of the three sites, it said the mandatory controls apply to the infected or suspected plants and to plants of the same species in the defined infected areas.

The ministry’s announcement did not mention a source of introduction. In past European cases, authorities have often examined the movement of plant material as well as the presence of insect vectors when tracing how the bacterium may have reached a site.

For growers in the Moselle region, the immediate effect is the loss of vines inside the affected plots and tighter controls in the surrounding buffer zones. Those controls are meant to reduce the risk that the bacterium could move further into one of Luxembourg’s main wine-producing districts.

Luxembourg’s response comes as European authorities continue to treat Xylella fastidiosa as a major agricultural threat because of its broad host range, the lack of a cure and the difficulty of stopping spread once the bacterium becomes established. The ministry said the sanitary measures now in place are mandatory.